OK, as most of you are well aware, I've been doing a lot of poking at our battery charger/power management chipset. (The MAX8998 basically does everything in the case of our device...) This was in response to frequent complaints about slow battery charging and batteries dropping when running Navigation at full brightness on a car dock.
What I've been able to figure out so far:
1) Our stock charge current limit is 600 mA, same as the Captivate and I'm fairly certain the i9000
2) Our battery is slightly larger (1750 mAh) than the Captivate's (1500 mAh).
3) At least on our devices, CPU/screen/etc. usage count against the charge current limit. So the amount going into the battery is 600 mA MINUS whatever the phone is using to operate. This becomes a negative amount with navigation at full brightness.
Lots of Captivate users indicate that their batteries charged MUCH faster than the Infuse.
1) and 2) alone would only cause a small difference between our device and the Captivate - our device has the same charge current limit and the battery is only slightly larger.
3) can make a huge difference, especially if the Captivate doesn't count usage against the charge current limit at all. So the question is, which of the following is the behavior of the Captivate?
a) CPU/screen/etc usage don't count against charge current at all
b) They count against charge current, but the slower CPU and smaller screen mean there's less current counting against us.
So, I'm asking for help from Captivate/i9000 users to run some tests for me. What I need you to have:
1) A Captivate or i9000
2) A kernel that supports the CurrentWidget app from the market. It needs to report 0 mA when off of a charger, and a positive number when on the charger. If it reports "no data", you need a different kernel. I know that for a while MikeyMike01 was running an MIUI/CyanogenMod kernel that was missing the required support. If you get "no data", point me to some other kernels that have source posted on github (please, no kernels with only tarball sources) you can try and I'll look to see if CurrentWidget is supported in them.
Once you've got the above, plug the phone into a charger when the phone is reasonably discharged (below 70-80%, and more specifically make sure battery voltage doesn't rise above 4.05-4.10 volts when you check charge current.) Report the current in mA indicated by CurrentWidget here and I'll provide more instructions based on those results. Please report whether you had the phone connected via a wall charger or via USB - it DOES make a difference.
I came from a captivate, my dad is using it now, when I get home I can check it out..gimme an hour or so
I don't know if his rom supports current widget though. I think the last one I installed for him was mosaic v. If it is supported it shouldn't be a problem at all.
Sent from my SAMSUNG-SGH-I997R using XDA Premium App
Bummer, the rom he is on doesn't support it. I don't really want to change stuff up for him, so somebody else will have to chime in. Sorry. I know that there are plenty if people on here though that have switched from a captivate, so somebody should be able to help you out. Either that or go make a thread in the captivate forum to have somebody help you out there; they're pretty friendly over there so that shouldn't be an issue. I know that different chargers make a difference, so maybe tell them to make sure and use the oem samsung wall charger.
On a side note, I'm running infused 2.0.4 and current widget is saying I'm charging at 1115-1117 mA with the oem samsung wall charger. Hmmm. I am at like 6% battery though, don't know if that means anything.
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I have my captivate standing by at home. I will be there in around 2 hrs and can install any rom you like on it. Im currently stock KF1
just waiting on my battery to die
welchertc said:
Bummer, the rom he is on doesn't support it. I don't really want to change stuff up for him, so somebody else will have to chime in. Sorry. I know that there are plenty if people on here though that have switched from a captivate, so somebody should be able to help you out. Either that or go make a thread in the captivate forum to have somebody help you out there; they're pretty friendly over there so that shouldn't be an issue. I know that different chargers make a difference, so maybe tell them to make sure and use the oem samsung wall charger.
On a side note, I'm running infused 2.0.4 and current widget is saying I'm charging at 1115-1117 mA with the oem samsung wall charger. Hmmm. I am at like 6% battery though, don't know if that means anything.
Sent from my SAMSUNG-SGH-I997R using XDA Premium App
Click to expand...
Click to collapse
This is why I wanted information from a partially discharged battery - During the constant-current phase (from very low up to around 90% or so), our phones and the Captivate are limited to 600 mA. However all of the ADCs have a scaling factor that is different from phone to phone. Ours is 1.83 times reality, Epic 4G is apparently something like reality divided by 2.2.
So I need to find out what the Cappy is.
TheChefSLC said:
I have my captivate standing by at home. I will be there in around 2 hrs and can install any rom you like on it. Im currently stock KF1
Click to expand...
Click to collapse
I'll poke around to see what's available. I'm not super-familiar with what ROMs are available - but with a link to kernel source I can determine if a kernel is likely to support CurrentWidget. Of course it's ideal if a few people have phones that support it already.
00mred00 said:
just waiting on my battery to die
Click to expand...
Click to collapse
Doesn't need to be dead, just needs to be low enough to get a good scale factor for CW (see above). Once we've figured out the right correction factor the region I'm looking in is the constant-voltage phase near the end of charging (starts around 90%ish). This is where voltage is held constant at nearly 4.2 volts and the current starts dropping.
In our phones, if you turn the screen on for a bit or run StabilityTest for a few minutes, the charge current goes up significantly (since CPU/screen usage count against charge current limit). So the CurrentWidget graph if you're logging with CW looks "spiky". Ideally it should look smooth - so I'm wondering if the Captivate is smooth, or just "spiking less" due to smaller screen/slower CPU.
Using infused 2.04 and bedwa's gb kernel.
1102-1115 ma
It started at 3.66 volts and went to 3.96 volts
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00mred00 said:
Using infused 2.04 and bedwa's gb kernel.
1102-1115 ma
It started at 3.66 volts and went to 3.96 volts
Sent from my SAMSUNG-SGH-I997R using XDA App
Click to expand...
Click to collapse
I've got a fair amount of data on the Infuse itself - I'm looking for Captivate (and maybe i9000) data for comparison.
Those are about what I'd expect for an Infuse. If you set CurrentWidget to divide by 1.83 you should see it report 600 mA until voltage hits around 4.18 volts. Voltage will initially rise rapidly right after you connect the charger, then rise more slowly up to 4.18 or so. At 4.18, current will start dropping. On the Infuse it drops but with "spikes".
I'm curious if the Captivate also has "spikes" in this phase or not.
Entropy512 said:
This is why I wanted information from a partially discharged battery - During the constant-current phase (from very low up to around 90% or so), our phones and the Captivate are limited to 600 mA. However all of the ADCs have a scaling factor that is different from phone to phone. Ours is 1.83 times reality, Epic 4G is apparently something like reality divided by 2.2.
So I need to find out what the Cappy is.
I'll poke around to see what's available. I'm not super-familiar with what ROMs are available - but with a link to kernel source I can determine if a kernel is likely to support CurrentWidget. Of course it's ideal if a few people have phones that support it already.
Doesn't need to be dead, just needs to be low enough to get a good scale factor for CW (see above). Once we've figured out the right correction factor the region I'm looking in is the constant-voltage phase near the end of charging (starts around 90%ish). This is where voltage is held constant at nearly 4.2 volts and the current starts dropping.
In our phones, if you turn the screen on for a bit or run StabilityTest for a few minutes, the charge current goes up significantly (since CPU/screen usage count against charge current limit). So the CurrentWidget graph if you're logging with CW looks "spiky". Ideally it should look smooth - so I'm wondering if the Captivate is smooth, or just "spiking less" due to smaller screen/slower CPU.
Click to expand...
Click to collapse
I didnt know that 1.6 Ghz is slower than the infuse? Maybe i pushed mine a little more but my phones faster
Sent from my plain KF1 Gingerbread Captivate using the XDA Premium App.
b-eock said:
I didnt know that 1.6 Ghz is slower than the infuse? Maybe i pushed mine a little more but my phones faster
Sent from my plain KF1 Gingerbread Captivate using the XDA Premium App.
Click to expand...
Click to collapse
Stock is 1...
However if it charges when cranked to full speed with the screen on, that would be interesting. I would LOVE for some CurrentWidget tests if CW is working for you.
Entropy512 said:
Stock is 1...
However if it charges when cranked to full speed with the screen on, that would be interesting. I would LOVE for some CurrentWidget tests if CW is working for you.
Click to expand...
Click to collapse
I does, but only for a bit, then it wont charge for a bit...
Sent from my plain KF1 Gingerbread Captivate using the XDA Premium App.
Driving....car charger....nav and pandora running
871 ma 3.728 vlts
Sorry...see now you are looking for captivate info
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b-eock said:
I does, but only for a bit, then it wont charge for a bit...
Sent from my plain KF1 Gingerbread Captivate using the XDA Premium App.
Click to expand...
Click to collapse
That's interesting...
Does CurrentWidget work for you?
"Plain KF1" - does that include stock kernel?
Forgive me - I'm only mildly familiar with the Captivate, just that there are LOTS of reports from others it charges significantly faster than the Infuse, so I'm trying to figure out why.
Entropy512 said:
That's interesting...
Does CurrentWidget work for you?
"Plain KF1" - does that include stock kernel?
Forgive me - I'm only mildly familiar with the Captivate, just that there are LOTS of reports from others it charges significantly faster than the Infuse, so I'm trying to figure out why.
Click to expand...
Click to collapse
Yahh stock kernel, for now. Was on MIUI a few days ago at 1.6 GHz stable(im a speed and flashing junkie) and i havent tried the widget
Sent from my plain KF1 Gingerbread Captivate using the XDA Premium App.
00mred00 said:
Driving....car charger....nav and pandora running
871 ma 3.728 vlts
Sorry...see now you are looking for captivate info
Sent from my SAMSUNG-SGH-I997R using XDA App
Click to expand...
Click to collapse
Heh. Your car charger is either being detected as USB or it's browning out (not enough current capacity). Probably USB - 871 mA becomes 475 when you divide it by the 1.83 scale factor, and that's EXACTLY what the current limit when on a USB charger is. In CurrentWidget settings, it's "Operation on Value", "Operation Type" is Divide, and "Operation Value" is 1.83 for the Infuse.
The correct settings for the Captivate are unknown. That's what the initial test (reported current on AC when reasonably discharged) is for.
Entropy512 said:
Heh. Your car charger is either being detected as USB or it's browning out (not enough current capacity). Probably USB - 871 mA becomes 475 when you divide it by the 1.83 scale factor, and that's EXACTLY what the current limit when on a USB charger is. In CurrentWidget settings, it's "Operation on Value", "Operation Type" is Divide, and "Operation Value" is 1.83 for the Infuse.
The correct settings for the Captivate are unknown. That's what the initial test (reported current on AC when reasonably discharged) is for.
Click to expand...
Click to collapse
Makes sense....my car charger is usb>into a usb car adaptor
Made the changes to /1.83
Sent from my SAMSUNG-SGH-I997R using XDA App
Entropy512 said:
Heh. Your car charger is either being detected as USB or it's browning out (not enough current capacity). Probably USB - 871 mA becomes 475 when you divide it by the 1.83 scale factor, and that's EXACTLY what the current limit when on a USB charger is. In CurrentWidget settings, it's "Operation on Value", "Operation Type" is Divide, and "Operation Value" is 1.83 for the Infuse.
The correct settings for the Captivate are unknown. That's what the initial test (reported current on AC when reasonably discharged) is for.
Click to expand...
Click to collapse
That saddens me. I was thinking about adding a USB port to my dash area to allow me to more easily keep my infuse plugged in with the car dock(the cigarette adapter blocks one of only two cupholders). If I can't use USB to charge enough, I'm screwed. ;P
araemo said:
That saddens me. I was thinking about adding a USB port to my dash area to allow me to more easily keep my infuse plugged in with the car dock(the cigarette adapter blocks one of only two cupholders). If I can't use USB to charge enough, I'm screwed. ;P
Click to expand...
Click to collapse
There's a bit of confusion here. There is a REAL USB port, there are dumb chargers that are detected as USB ports, and there are dumb chargers that are properly detected as dumb chargers. Physically, they all look exactly the same. Electrically they are different.
Real USB port - An actual USB host
Dumb charger accidentally detected as USB - who knows. The resistors that iDevices use to indicate "dumb charger" are nonstandard and frequently cause this. iPad/iPhone/iPod chargers are detected as normal USB ports by the Infuse.
Dumb charger detected as a dumb charger - In the case of our Infuse, these have USB D+ and D- shorted together. You can either fix this with a solder blob in the charger, or a cable that shorts D+ and D- for you, like AT&T's dedicated "charge only" cable.
Still looking for someone with working CurrentWidget on a Captivate or i9000...
Entropy512 said:
AT&T's dedicated "charge only" cable.
Click to expand...
Click to collapse
Why does this seem like a recipe for trouble to me? If a simple cable can cause the phone to attempt to draw over-spec, I'd imagine seeing lots of fried usb ports and simple usb chargers. (That said, we're only drawing 600mA normally? That's only 20% over spec, so they can probably handle it.)
Interesting stuff.. didn't know that the extra-power usb power ports had that simple a standard.. I had gotten the impression that there was real negotiation going on, to figure out what they're rated at. (Since they originally said up to 1A I think, but then decided they needed a way to let some devices safely draw more).
And, consider this a bump. ;P
I think a buddy of mine has a captivate, so I may be able to get you some info in a week or two if you haven't gotten it by then.
Entropy see if Andromeda 3.0 running Ursa minor kernel will do please I can test a cappy on that rom and kernel.
Sent from my SGH-I997 using XDA App
Related
I'm heavy user because I always do nothing at work because I can do my thing in 2hrs and just pretend I'm doing something for the remaining 6hrs of my work, hate it when you have to charge for 4hrs, why the heck Samsung did this long charging, iPhone 4 charge like 1hr from 15% this really annoys me, even when driving using navigation while charging, battery still draining what the **** Samsung.
I'm might be calling Samsung and bug them for the remaining 6hrs at work when I am not doing anything.
1800SAMSUNG.
Sent from my SAMSUNG-SGH-I997 using XDA Premium App
spirikitik said:
I'm heavy user because I always do nothing at work because I can do my thing in 2hrs and just pretend I'm doing something for the remaining 6hrs of my work, hate it when you have to charge for 4hrs, why the heck Samsung did this long charging, iPhone 4 charge like 1hr from 15% this really annoys me, even when driving using navigation while charging, battery still draining what the **** Samsung.
I'm might be calling Samsung and bug them for the remaining 6hrs at work when I am not doing anything.
1800SAMSUNG.
Sent from my SAMSUNG-SGH-I997 using XDA Premium App
Click to expand...
Click to collapse
I dont think a ROM can make a phone charge faster, but I know when I had my Captivate I had Serendipity and it improved my battery life by at least 2 hrs.
seriously, the infuse has a large battery, 1760mAh i think. it's going to take longer to charge because it has more to charge. blame physics
boondoc said:
seriously, the infuse has a large battery, 1760mAh i think. it's going to take longer to charge because it has more to charge. blame physics
Click to expand...
Click to collapse
Physisc lol seems like you cut. Physics class, haven't you heard about rapid chargers?
I just called Samsung they told me even if I buy fast charger it won't work because the software design to regulate the amount of current when charging is set to a certain amp to not damage the battery,
So it is not physics it is just common sense because they told me that it is software. And the software has nothing to do with your 1750mah and your physics knowledge dreams of yours. And stop reminding me of physics I hate that class is too boring for me so I just sleep on my physics class.
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spirikitik said:
Physisc lol seems like you cut. Physics class, haven't you heard about rapid chargers?
I just called Samsung they told me even if I buy fast charger it won't work because the software design to regulate the amount of current when charging is set to a certain amp to not damage the battery,
So it is not physics it is just common sense because they told me that it is software. And the software has nothing to do with your 1750mah and your physics knowledge dreams of yours. And stop reminding me of physics I hate that class is too boring for me so I just sleep on my physics class.
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Click to expand...
Click to collapse
Forget Physics. You should have paid more attention in Grammar class. Maybe then you would be familiar with the concept of periods.
Stop feeding this troll.
Sent from my SAMSUNG-SGH-I997 using Tapatalk
Grab a kernel with a modified charging script. It's all in the kernel.
Sent from my SPH-D700 using XDA Premium App
Overstew said:
Grab a kernel with a modified charging script. It's all in the kernel.
Sent from my SPH-D700 using XDA Premium App
Click to expand...
Click to collapse
Oh so we really need netarchy. Thanks the donation doesn't meet his goal yet, mikeymike is done he will buy an Infuse maybe 2day or tommorow thanks
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tankmorph said:
Forget Physics. You should have paid more attention in Grammar class. Maybe then you would be familiar with the concept of periods.
Stop feeding this troll.
Sent from my SAMSUNG-SGH-I997 using Tapatalk
Click to expand...
Click to collapse
Off course my grammar sucks because I only have been here in the US in a year, and I am lucky enough to live here in santa clarita where almost all American do not care about grammars, they are so educated enough to understand people who don't grew here in the US, and they don't use the word troll, I love living with white people. And hate talking to people tell other they are troll and he's not.
By the way try to go to Taiwan let us see how your grammar is in 1 year and 2 months then ask yourself if you are a troll or shrek
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LMAO at this thread.
Butt seriously, this guy has a perfectly valid point. The Infuse charges MUCH more slowly than any previous android phone I've had. It's not even close, and it can't all be explained by a bigger battery. The battery in my Droid X was very close to the number of mAH of the Infuse, yet it would charge 3 to 4 times faster.
Does anyone know the maximum amount of current the Infuse is set up to use when charging? That way at least we'd know if it's pointless to get a new charger beyond a certain number of amps.
If you use a OC kernel, you can set it at 100mzh max speed while charging. Not sure if this will charge faster.
My htc inspire charger charges my infuse much faster than the one that came with it
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halo0 said:
LMAO at this thread.
Butt seriously, this guy has a perfectly valid point. The Infuse charges MUCH more slowly than any previous android phone I've had. It's not even close, and it can't all be explained by a bigger battery. The battery in my Droid X was very close to the number of mAH of the Infuse, yet it would charge 3 to 4 times faster.
Does anyone know the maximum amount of current the Infuse is set up to use when charging? That way at least we'd know if it's pointless to get a new charger beyond a certain number of amps.
Click to expand...
Click to collapse
According to comments in the kernel code, 600 mA. Unfortunately without the MAX8998 datasheet, I only have comments to go by. Unlike most of Maxim's products, the 8998's datasheet does not appear to be public. That's battery input current, then there's the current needed to just keep the phone running which is ???
It's possible to increase the current, I'm running a test kernel that does it. However before unleashing it on the public I need to do some testing, such as:
1) Figure out whether it gracefully handles input "voltage droop" from weaker chargers such as the AT&T car charger and many other car chargers out there. All of my new 1A chargers are actually not 1A chargers, good thing they were just over a buck apiece. (The MC34063A used in them can't reliably output 1A at 5v when off of a 12v supply.)
2) If it doesn't, if there is a way to make it do so.
3) What sort of battery overtemperature protections there are, if any. If there aren't, the current needs to stay where it is.
Hopefully this can be tweaked in the kernel... My 2100 mAh car charger could charge my Captivate 20% in a 15 minute car ride. The Infuse? Not so much...
Sent from my Infuse 4G
MikeyMike01 said:
Hopefully this can be tweaked in the kernel... My 2100 mAh car charger could charge my Captivate 20% in a 15 minute car ride. The Infuse? Not so much...
Sent from my Infuse 4G
Click to expand...
Click to collapse
Got a link to the kernel you were using on the Captivate at that time?
Turn it off when charging...
Sent from my MB860 using XDA App
Entropy512 said:
Got a link to the kernel you were using on the Captivate at that time?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=893880
Sent from my Infuse 4G
MikeyMike01 said:
http://forum.xda-developers.com/showthread.php?t=893880
Sent from my Infuse 4G
Click to expand...
Click to collapse
I'll take a look at that at some point. Unfortunately he includes source in a tar file, not on github, so I can't just browse to it from wherever.
As I mentioned above, it IS possible to increase the charge current in our devices by setting the MAX8998 PMIC's current limit differently, and I do have a kernel with the change integrated running on my device, but before publishing a kernel for public use I want to spend some time investigating possible negative side effects.
I personally couldn't care less. I easily make it to an overnight charge and then it can take as long as it wants (I'm on my third day of uncharged use right now). I'd rather the battery charge slowly and preserve it peak charging capacity (or as close to it as possible).
nstong said:
I personally couldn't care less. I easily make it to an overnight charge and then it can take as long as it wants (I'm on my third day of uncharged use right now). I'd rather the battery charge slowly and preserve it peak charging capacity (or as close to it as possible).
Click to expand...
Click to collapse
I think that *most likely*, other than the fact that weak-ass USB chargers abound and that could cause issues with higher charge current settings, it is safe to bump up our charge current 20%, since our battery capacity is 20% higher.
i.e. charge current up by 20% (which is what my current kernel tweak does) compared to other phones keeps our charge rate in terms of C the same as other phones.
I won't be porting any of the other charge tweaks from http://forum.xda-developers.com/showthread.php?t=996631 to our kernels myself - in fact if anything to keep the battery from getting abused, I might pair the increased charge current with a more conservative topoff/charge termination threshold.
One thing that's interesting is our kernel seems to claim some sort of "step charging" code, however it seems to always go to max charge rate even when the battery is in the 90s. I still need to make sense of the stepcharging routine - it looks like it would just cycle between 4 different current settings constantly, but in reality it goes right to the max in all situations except for when the battery is in constant-voltage charging (near charge termination).
nstong said:
I personally couldn't care less. I easily make it to an overnight charge and then it can take as long as it wants (I'm on my third day of uncharged use right now). I'd rather the battery charge slowly and preserve it peak charging capacity (or as close to it as possible).
Click to expand...
Click to collapse
Yeah that's great for you, but for those of us whose phones die in 12-15 hours, not so much. In addition, the fact that the battery discharges while being charged in the car and running nav is kind of ridiculous.
I'm currently running Sean's latest leak/update and have noticed significant battery drain despite being plugged into the charger. I never really paid enough attention while on gb roms, so I'm not sure if this is an ics thing or not. My buddy at work has had similar issues and is completely bone stock, so I'm thinking it's just a skyrocket issue.
Anybody else notice this? It happens no matter what I'm doing on the phone and is obviously more noticeable when playing games. It seems to me that the charger should at least compensate for the usage!
It had me so baffled, I've re-flashed multiple times now with the same results.
Sent from my SAMSUNG-SGH-I727 using XDA
Your using the OEM charger? whats the max amp written on it?
kishke said:
Your using the OEM charger? whats the max amp written on it?
Click to expand...
Click to collapse
Yeah... it's 5v/1a. Same with my buddy. I thought that might be the problem, and I had switched it with an old one, but don't think so. I've used the powerskin in the past, and it's also 5v/1a... still drains with it.
I'm totally puzzled! I've changed chargers, gone with/without the powerskin, re-flashed roms, calibrated the battery and who knows what else. Only thing I hadn't done was replace the battery, but now that my buddy is having issues on stock, I don't know if that's the problem or not....
Sent from my SAMSUNG-SGH-I727 using XDA
Its probably the battery while charging check if in about phone it says its conncted to ac.
Also are you rooted?
Could also be the cable. I have had the exact issue, replaced the cable and now its fine. Its funny cause the galaxy s2 is far more picky when it comes to chargers/cables. For instance. I can plug it in and the phone won't do a think, yet when I plug it in the skyrocket it will accept the connection.
kishke said:
Its probably the battery while charging check if in about phone it says its conncted to ac.
Also are you rooted?
Click to expand...
Click to collapse
I'm thinking it's the battery... it shows it's charging. I've tried spare chargers and cable combos with the same outcome. It's just odd that my friend's is doing the same thing!
I'm rooted/rom'd & he's bone stock.
Sent from my SAMSUNG-SGH-I727 using XDA
g2tegg said:
Could also be the cable. I have had the exact issue, replaced the cable and now its fine. Its funny cause the galaxy s2 is far more picky when it comes to chargers/cables. For instance. I can plug it in and the phone won't do a think, yet when I plug it in the skyrocket it will accept the connection.
Click to expand...
Click to collapse
I've tried diff cable/charger combos... no luck. I had cable issues with my epic (sprint) and knew Samsung had issues with them in the past, so that was one of the first things that came to mind... no dice though!
Sent from my SAMSUNG-SGH-I727 using XDA
Test your receptacle with a digital multi meter . The stock charger works great. Enough so
That i spliced 3 high quality usb cable and have over a ten foot cable which charges just fine.
So its possible. U have a bad charger. Crap cables. Or overdrawn circuit whith your receptacles. No enough to trip but enough your charger cant pull 1 amp
traumaj said:
I'm currently running Sean's latest leak/update and have noticed significant battery drain despite being plugged into the charger. I never really paid enough attention while on gb roms, so I'm not sure if this is an ics thing or not. My buddy at work has had similar issues and is completely bone stock, so I'm thinking it's just a skyrocket issue.
Anybody else notice this? It happens no matter what I'm doing on the phone and is obviously more noticeable when playing games. It seems to me that the charger should at least compensate for the usage!
It had me so baffled, I've re-flashed multiple times now with the same results.
Sent from my SAMSUNG-SGH-I727 using XDA
Click to expand...
Click to collapse
I noticed the same issue. Dont worry, offical ics will be out very soon!
Sent from my SAMSUNG-SGH-I727 using xda premium
I did a 1.5 hour Skype video while on charge and my battery never charged it held at the same percentage. Anything else I do charging outweighs my use. Gotta be the charger or the phone itself. Even if you have no battery in it should still boot off the charger and run correct?
traumaj said:
I'm thinking it's the battery... it shows it's charging. I've tried spare chargers and cable combos with the same outcome. It's just odd that my friend's is doing the same thing!
I'm rooted/rom'd & he's bone stock.
Sent from my SAMSUNG-SGH-I727 using XDA
Click to expand...
Click to collapse
Use any type of root explorer, while charging got to sys/class/power supply/battery
and open batt_current_xxx or something like this, I'll check it later if you get into troubles, breaking my head now with tasker at the moment. It should show a value around 8500, at least that's what it shows for me.
I'm having the same issue on Sean's latest update, my battery current adc file says 2934... I posted this in the sky ics thread
"I've been having some battery issues since coming to this ROM on update six. I'm on nine now and all is well, battery life included once I get it charged up. I'm using OEM Samsung everything, charging block, two different cables, my original battery and a 2100Mah extended for the Gnex. All Samsung, no change between them. This thing just REFUSES to charge if I'm using it while plugged in, and if I leave it alone and let it charge, it takes absolutely forever to charge either battery. The skyrocket battery won't gain one percent charge if I'm using it while plugged in, and the Gnex battery actually discharges slowly!  Any ideas? I bought this phone from a member on here and it came with superlite 5 and I don't recall it having this problem."
If the file reading is that low there must be an issue with the amp, if you tried a different charger and cables and it happened since changing roms I'd say its a pure software issue. Maybe you should try flashing a different kernel before trying to change your rom, the problem may be laying there.
I had the same issue but mine was related to the usb cable. With a new micro usb cable my phone charges without issue.
Sent from my SAMSUNG-SGH-I727 using xda premium
It's a JiaYu G2. Generally they are very well reviewed. Well, she's had the phone for about 10 days and all of a sudden it stopped charging regularly... It charges extremely slowly. Leaving it overnight for 8 hours charges it only about 30%.
Some of what we tried:
Had her do a power off and battery pull and restart
Charge while turned off
We checked the incoming mA via JiaYu's engineering menu (*#59#) and the incoming mA are fluctuating between 200-450. Is that normal? or should it be a more steady number?
Really really really hoping it's the charger and not the phone. Shipping the phone back and dealing with the Chinese on a customer service issue isn't my idea of a fun couple of weeks.
Ummm... Nobody knows if incoming mA fluctuates?
I have no idea, but have you tried another charger? If the source is really what's fluctuating, it sounds like a charger or other problem.
Maybe the battery is bad. You could try a different one, too. I have no idea if that would cause those symptoms, but you could Google it.
Sent from my SGH-T999 using xda app-developers app
Pennycake said:
I have no idea, but have you tried another charger? If the source is really what's fluctuating, it sounds like a charger or other problem.
Maybe the battery is bad. You could try a different one, too. I have no idea if that would cause those symptoms, but you could Google it.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
Thanks for your reply. We ordered another charger (from USA) and waiting for it to arrive. Her first language isn't English and she doesn't have transportation, so she's shy to go to an electronics shop.
Another battery would have to be ordered from China. She tested it out with an external charger and it seemed to charge much better than in the phone, but still quite slow... Not enough evidence either way to conclude if it's the battery because it's one of those multi-battery charges where the "pins" can be expanded to accomodate different batteries.... It hasn't been tested with a different battery, so not sure what "normal" charging time is with it.
The phone is only 10 days old...Really hoping it's not the phone... Dealing with Chinese companies on any sort of customer service issue is a nightmare.
What I was hoping was that someone knew about this... Regarding incoming mA from the wall charger... I don't know enough about it... Whether or not fluctuating from 200-500 is normal...
Anyone with a JiaYu G2 could test this out... Or anyone who has "live" mA data read capability through engineering mode or perhaps even "current widget" and can see if it fluctuates...
I'll check that out when I charge tonight if no one else gets back to you. It doesn't sound right to me since my wall charger does a pretty dead-on 2 hour charge at 1000mA, but perhaps it fluctuates and I don't notice (not my area).
Sent from my SGH-T999 using xda app-developers app
Unfortunately, I have discovered that neither my phone or tablet support monitoring incoming current levels.
One thing I thought of is that perhaps the phone is regulating current so that it is "fast" charging at 400mAh and then going down for the final bit. This seems to be an idea I've heard of before. 400mAh is still pretty low for a wall-charger, though - does it fluctuate all the time, or is there a pattern ? What is the charger *supposed* to proivide ?
I'm thinking about how charging from my computer's USB, it charges at a rate of 500mAh - and that will still charge to 100% in less than a night. Even if it was only drawing 200mAh all night, it should still be fully charged, definitely not just 30% (it would have to have an unheard of high capacity for that to make sense).
I don't know a lot about electricity, but I would wonder if the voltage is wrong or something, maybe ?
Hopefully someone who knows more about electricity will see this.
Sent from my Transformer TF101 using xda app-developers app
Pennycake said:
Unfortunately, I have discovered that neither my phone or tablet support monitoring incoming current levels.
One thing I thought of is that perhaps the phone is regulating current so that it is "fast" charging at 400mAh and then going down for the final bit. This seems to be an idea I've heard of before. 400mAh is still pretty low for a wall-charger, though - does it fluctuate all the time, or is there a pattern ? What is the charger *supposed* to proivide ?
I'm thinking about how charging from my computer's USB, it charges at a rate of 500mAh - and that will still charge to 100% in less than a night. Even if it was only drawing 200mAh all night, it should still be fully charged, definitely not just 30% (it would have to have an unheard of high capacity for that to make sense).
I don't know a lot about electricity, but I would wonder if the voltage is wrong or something, maybe ?
Hopefully someone who knows more about electricity will see this.
Sent from my Transformer TF101 using xda app-developers app
Click to expand...
Click to collapse
The wall charger is rated for 500mA output... It's within seconds... I don't mean staying steady and then changing at the end.
I really need another battery and a charger. The charger should be arriving within a few days, so we should be to eliminate that as the issue, but if it doesn't fix the issue, still won't know if it's the battery or the phone.
I have a sneaking suspicion it's the phone... but hoping to here some good news here that fluctuating between 250-450 is NOT normal, thus likely the charger... But as you mentioned, even if left at 200 it still should fully charge overnight... Unless the fluctuating is causing the battery to not accept the charge properly... I don't know
What a pain in the ass. I guess there's something to be said for buying local.
every time i plug my charger into my phone, it says "battery have low temperature, discharge for battery health" or something like that.
but it still recharges when the phone is shut down.
can someone help me?
i already tried another battery, but the result is the same.
Wow almost 50 views, yet no answer?!
Alibieli said:
Wow almost 50 views, yet no answer?!
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Click to collapse
Which rom are you on ?
No replies because the error you're having is quite rare , in fact it may be the first i've seen in the forum.
I don't know what causes it , if it charges with device shut down then it's probably software related.
Flash a different ROM then see if it is fixed.
If it's not then it's probably a hardware related issue.
boltthrower56 said:
Which rom are you on ?
No replies because the error you're having is quite rare , in fact it may be the first i've seen in the forum.
I don't know what causes it , if it charges with device shut down then it's probably software related.
Flash a different ROM then see if it is fixed.
If it's not then it's probably a hardware related issue.
Click to expand...
Click to collapse
Well, the first one i got this was when i flash GB bin file. then i tried to flash official ICS. with no luck, i flash the paranoid rom and still the same.
it's ok if you don't have the answer but hey, i will appreciate any post that at least tried to help me.
Thanks.
Alibieli said:
Well, the first one i got this was when i flash GB bin file. then i tried to flash official ICS. with no luck, i flash the paranoid rom and still the same.
it's ok if you don't have the answer but hey, i will appreciate any post that at least tried to help me.
Thanks.
Click to expand...
Click to collapse
It's probably the adapter because kernel doesn't accept charge for some reason , that's why it charges with the phone off.
Check your adapter ratings , In the original it's rated 4.8 Volts with 1 Amp but anything around 4.5-5 volts and 1 Ampere or below should work but i've had problems with stock roms not charging with an adapter they don't recognize so try it out with original if it's not.
Also , try using the blue kernel from ibluemind , and enable the force ac charge with a file manager , the guide is in the thread.
I don't know if it disables protections in the kernel level , but if it does it might work for you.
Well, half of the phones out there have programmable battery charger chip (AKA Intelligent Li-ion battery charger), and if the BIOS (bootloader) is corrupted or if flashed wrongly, it simply refuse to charge or do so half-way. And as far as charger is concerned, 4.4 Volts minimum is recommended in most case (due to diode voltage drop in the bypass FETs in the charger chip). 5.2 Volts is the maximum as well. Ampere doesn't matter as Li-ion battery is pretty efficient as far as charge absorption is concerned - it generates almost no heat when charging compared to Nickel-Cadmium battery. Of course, go with beefy charger (2 A, 5 V) as the CPU and LCD eats lot more power than what is able to be put into the battery.
Sent from my LG-P920 using xda app-developers app
Dr. Mario said:
Well, half of the phones out there have programmable battery charger chip (AKA Intelligent Li-ion battery charger), and if the BIOS (bootloader) is corrupted or if flashed wrongly, it simply refuse to charge or do so half-way. And as far as charger is concerned, 4.4 Volts minimum is recommended in most case (due to diode voltage drop in the bypass FETs in the charger chip). 5.2 Volts is the maximum as well. Ampere doesn't matter as Li-ion battery is pretty efficient as far as charge absorption is concerned - it generates almost no heat when charging compared to Nickel-Cadmium battery. Of course, go with beefy charger (2 A, 5 V) as the CPU and LCD eats lot more power than what is able to be put into the battery.
Sent from my LG-P920 using xda app-developers app
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Click to collapse
Is there a way to repare a corrupt BIOS and get the charging to work again?
Sent from my LG-P920 using xda app-developers app
There are unlocked ones floating around in this forum - try OS_Hacking's tool - it contain P920 and SU760 versions - be sure to pop in Gingerbread bootloader after flashing P920 BIOS so you can boot up gingerbread ROM or even CyanogenMod ROM.
Sent from my LG-P920 using xda premium
boltthrower56 said:
It's probably the adapter because kernel doesn't accept charge for some reason , that's why it charges with the phone off.
Check your adapter ratings , In the original it's rated 4.8 Volts with 1 Amp but anything around 4.5-5 volts and 1 Ampere or below should work but i've had problems with stock roms not charging with an adapter they don't recognize so try it out with original if it's not.
Also , try using the blue kernel from ibluemind , and enable the force ac charge with a file manager , the guide is in the thread.
I don't know if it disables protections in the kernel level , but if it does it might work for you.
Click to expand...
Click to collapse
i found the thread, but i can't find how to enable force ac charge.
can you help me?
So here is the deal... I have been a Verizon customer for years, and I am just sick and tired of them jerking me around and upping their rates, taking away unlimited data, taking away early upgrades, etc. So I am thinking of jumping ship and going to Net10. I am currently using the HTC Rezound which seems to be roughly roughly equivalent to the Skyrocket (Yes, I know I will not get true 4G/LTE on Net10, only HSPA+). I can get a new, sealed in the box Galaxy S2 Skyrocket (SGH-i727) for about $210 on eBay.
So where I am going with this, knowing Samsung has had quality models and, well, lets just say questionable models, how is the Skyrocket? Is it solid and relatively problem free? How is battery life, is it easy to unlock, root, ROM, return to stock, etc? Has anyone used this on Net10/StraightTalk?
So basically I am just looking for people's opinion of the phone in general, from a heavy phone users perspective... My other alternative's at this time are a new unlocked HTC Vivid which I can get new for just under $200, or just suck it up and grab a Nexus 4 from Google, although the $350+tax and shipping for the 16GB model would hurt, a lot, right now.
Thoughts?
I, along with most other power users here in the skyrocket forum will tell you that this is a great device. Rooting, rom-ing, and general modifications are a breeze as long as you read the stickies and have an ounce of common sense. Battery life is subjective to individual use, but I generally get around 12-15 hours with 3-5 hours screen on time. This can be extended significantly with a nexus extended battery and a minor modification (see accessories section for details). Hardware wise it it solid. The only common issue we've really seen is the power button failing for some users, I've had mine since it was released though with no issue so far. We have official support for CM, Slim Bean, PACMAN, and Avatar ROM (maybe more but I can't remember off hand), and ports or unofficial builds of just about everything else you'd want. Also, 4.3 is being worked on hard by our fine devs, and it seems that external speaker audio is the only thing preventing a beta release for most roms at the moment.
The community is, for the most part, knowledgeable and willing to assist with any problems you have as long as you attempted to do your homework first.
Any other questions, let me know. Otherwise, I'll extend a tentative welcome to the Skyrocket family.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
bps119 said:
I, along with most other power users here in the skyrocket forum will tell you that this is a great device. Rooting, rom-ing, and general modifications are a breeze as long as you read the stickies and have an ounce of common sense. Battery life is subjective to individual use, but I generally get around 12-15 hours with 3-5 hours screen on time. This can be extended significantly with a nexus extended battery and a minor modification (see accessories section for details). Hardware wise it it solid. The only common issue we've really seen is the power button failing for some users, I've had mine since it was released though with no issue so far. We have official support for CM, Slim Bean, PACMAN, and Avatar ROM (maybe more but I can't remember off hand), and ports or unofficial builds of just about everything else you'd want. Also, 4.3 is being worked on hard by our fine devs, and it seems that external speaker audio is the only thing preventing a beta release for most roms at the moment.
The community is, for the most part, knowledgeable and willing to assist with any problems you have as long as you attempted to do your homework first.
Any other questions, let me know. Otherwise, I'll extend a tentative welcome to the Skyrocket family.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
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Click to collapse
Thanks for the info!!! I really appreciate it!!!
One more quick question, does the Skyrocket use a standard sized SIM, or one of the newer micro-SIMs?
acejavelin said:
Thanks for the info!!! I really appreciate it!!!
One more quick question, does the Skyrocket use a standard sized SIM, or one of the newer micro-SIMs?
Click to expand...
Click to collapse
Standard.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
One issue bothers me a lot. I cannot use the phone for navigation for more than 2 hours even with car charger connected. In about 2 hours, it drains out fully. My latest theory is that after about 30 mins of charging, the battery starts heating up, and so it stops charging.
unni_kmr said:
One issue bothers me a lot. I cannot use the phone for navigation for more than 2 hours even with car charger connected. In about 2 hours, it drains out fully. My latest theory is that after about 30 mins of charging, the battery starts heating up, and so it stops charging.
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Click to collapse
User error or bad unit I have zero issues with my GPS or car charging. Also what amperage is your car charger capable of outputting.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
mtdew said:
User error or bad unit I have zero issues with my GPS or car charging. Also what amperage is your car charger capable of outputting.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
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Click to collapse
I am not 100% sure in terms of the amperage. But I tried with a car charger capable of charging a laptop, using the wall charger and cable which came with the phone. I was sitting in the passenger seat, phone was in my lap (not mounted in windshield) and Google Maps was running in navigation mode. For the first 15 minutes or so, I saw that the phone was charging. The charge level increased by 1% or 2%. After I think 20 minutes, it stopped charging. CPU-Z app was showing battery status as
health: over heated or heated (don't remember clearly the text)
power source: connected
status: not charging or discharing
Phone's back was very hot. I unplugged the USB cable and connected it back, and it started charging again! I waited for it to cool down, removed the phone case, repeated this and got the same result.
This is why I believe the phone is doing something to protect it from over heating. I am not sure though.
Well, I placed my order and should have my Skyrocket by the end of the week, and already have my Net10 SIM and $50 Unlimited card! So basically I am saying you will see more of me around here in the future. Thanks again bps119!
unni_kmr said:
I am not 100% sure in terms of the amperage. But I tried with a car charger capable of charging a laptop, using the wall charger and cable which came with the phone. I was sitting in the passenger seat, phone was in my lap (not mounted in windshield) and Google Maps was running in navigation mode. For the first 15 minutes or so, I saw that the phone was charging. The charge level increased by 1% or 2%. After I think 20 minutes, it stopped charging. CPU-Z app was showing battery status as
health: over heated or heated (don't remember clearly the text)
power source: connected
status: not charging or discharing
Phone's back was very hot. I unplugged the USB cable and connected it back, and it started charging again! I waited for it to cool down, removed the phone case, repeated this and got the same result.
This is why I believe the phone is doing something to protect it from over heating. I am not sure though.
Click to expand...
Click to collapse
Amperage is important son too little it will discharge, I think it will limit if too much. Nav can cause some heat for some of these guys but I've never heard of it getting that high my guess is something was wrong.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
mtdew said:
Amperage is important son too little it will discharge, I think it will limit if too much. Nav can cause some heat for some of these guys but I've never heard of it getting that high my guess is something was wrong.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
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Click to collapse
Sorry for off topic. Can you please recommend a charger, preferable the one you are using?
unni_kmr said:
Sorry for off topic. Can you please recommend a charger, preferable the one you are using?
Click to expand...
Click to collapse
I have gotten my last few chargers at Sam's Club, they are about $10, and are rated at [email protected]
In an older phone I had a similar issue where my phone would overheat and not charge properly, once I got a new charger I cut the end off the old one and read the voltage with a meter, it was putting out almost 7.1v (should be 4.75-5.25vDC for USB 1.0-2.0 standard, and 5.25-5.75vDC for USB 3.0), pretty sure that is what caused it... cheap components equals cheap quality and flaws. Current rating should be irrelevant, as long as it meets the devices minimum requirements (most modern phones are [email protected]), even if a charger is rated at 2, 3, or even 5 amps, the device should not draw more than it can handle. Current is drawn, not pushed, a device will draw the needed current at the expected voltage, you can't really "over-current" a device by using a power source that is rated at the proper voltage but a higher current. Similar instance can occur by using a charger that has too low of a current rating, the device will try to draw more current than the adapter is rated at and the adapter will eventually fail or fall out of specifications.
Some other good chargers are by Anker, PowerGen, or RAVPower, and of course a Samsung branded adapter will work well, most all of these can be purchased for $8-$15 on Amazon. If the adapter is not rated with a current rating, then skip it, it is probably only 600ma-750ma and will be more headache than it's worth in the long run.
acejavelin said:
I have gotten my last few chargers at Sam's Club, they are about $10, and are rated at [email protected]
In an older phone I had a similar issue where my phone would overheat and not charge properly, once I got a new charger I cut the end off the old one and read the voltage with a meter, it was putting out almost 7.1v (should be 4.75-5.25vDC for USB 1.0-2.0 standard, and 5.25-5.75vDC for USB 3.0), pretty sure that is what caused it... cheap components equals cheap quality and flaws. Current rating should be irrelevant, as long as it meets the devices minimum requirements (most modern phones are [email protected]), even if a charger is rated at 2, 3, or even 5 amps, the device should not draw more than it can handle. Current is drawn, not pushed, a device will draw the needed current at the expected voltage, you can't really "over-current" a device by using a power source that is rated at the proper voltage but a higher current. Similar instance can occur by using a charger that has too low of a current rating, the device will try to draw more current than the adapter is rated at and the adapter will eventually fail or fall out of specifications.
Some other good chargers are by Anker, PowerGen, or RAVPower, and of course a Samsung branded adapter will work well, most all of these can be purchased for $8-$15 on Amazon. If the adapter is not rated with a current rating, then skip it, it is probably only 600ma-750ma and will be more headache than it's worth in the long run.
Click to expand...
Click to collapse
Good to see that we're getting a new user who actually does their homework. :thumbup:
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
acejavelin said:
Well, I placed my order and should have my Skyrocket by the end of the week, and already have my Net10 SIM and $50 Unlimited card! So basically I am saying you will see more of me around here in the future. Thanks again bps119!
Click to expand...
Click to collapse
Just like to say great. I love my skyrocket. Over clocked at 1.78ghz and 320mhz gpu . great performance. Also with nexus extended battery for $6.50 at sprint. I have no reason to buy another phone. Welcome to the skyrocket community.
Sent from my SAMSUNG-SGH-I727 using xda app-developers app
I have an HTC Sensation and today I rooted my friend's Skyrocket. I must say, EVERYTHING about the Skyrocket amazed me in terms of performance, ease of use, and quality even though it's very similar in hardware specs to my own phone (both are MSM8x60). Rooting the phone only took about 3 minutes (installed TWRP; there was no locked-bootloader crap to deal with) and the colors on the touchscreen are wonderful, not to mention the sensitivity of the screen is great as well. The Skyrocket has official CM10.1 going for it so I installed that and it's fantastic; everything runs perfectly. Even while using the kernel included in CM10.1 the device was very fast but when I overclocked it, the performance blew me away, not to mention the phone didn't heat up at all (even while gaming!); compared to that, my HTC hits 70°C while gaming on CM10.1 at stock CPU/GPU frequencies. Rooting my friend's Skyrocket today has thoroughly convinced me to never buy an HTC again Also, the Skyrocket has great dev support seeing as how CM10.1 is official for it.
TL;DR: The Skyrocket is way better than your HTC and, in terms of development, it's not gonna die any time soon.
unni_kmr said:
One issue bothers me a lot. I cannot use the phone for navigation for more than 2 hours even with car charger connected. In about 2 hours, it drains out fully. My latest theory is that after about 30 mins of charging, the battery starts heating up, and so it stops charging.
Click to expand...
Click to collapse
The Skyrocket (and several other Samsung phones) need special "type 2" chargers. Apple charges are type 6, so if it says compatible with Apple, don't use it as it may not work. If the two center pins on the USB port doesn't have a 50 ohm resistor across them (or not shorted) , the Skyrocket will only draw 350 mA. Samsung and older Curve BlackBerry chargers have the resistor. At 350 mA, the phone draws more than the charger is providing, and the charger circuitry heats up trying to keep up with demand.
Jrockttu has a great thread under General called "Fix your Skyrockets battery life"
I've MOD'd all of my chargers, now my phone is happy with the screen on all day while driving and it stays charged, or charges slowly...
Tim
Sent from my SAMSUNG-SGH-I727 using xda app-developers app
I recently got rid of my Skyrocket. It was a good device, but a bad phone. The built-in microphone is terrible, people were always screaming that they couldn't hear me unless I used a headset. The signal was poor too, and I would often not receive calls (with no missed call notification or anything).
The Cyanogenmod support is good, and for an old device it runs plenty smooth and plays all the games I throw at it. So it's not bad in that regard. But the actual phone functionality was a real problem for me.
frogacuda said:
i recently got rid of my skyrocket. It was a good device, but a bad phone. The built-in microphone is terrible, people were always screaming that they couldn't hear me unless i used a headset. The signal was poor too, and i would often not receive calls (with no missed call notification or anything).
The cyanogenmod support is good, and for an old device it runs plenty smooth and plays all the games i throw at it. So it's not bad in that regard. But the actual phone functionality was a real problem for me.
Click to expand...
Click to collapse
user error
---------- Post added at 06:47 PM ---------- Previous post was at 06:46 PM ----------
mtdew said:
Faulty device or user error.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
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Click to collapse
lol didn't see your post
acejavelin said:
Well, I placed my order and should have my Skyrocket by the end of the week, and already have my Net10 SIM and $50 Unlimited card! So basically I am saying you will see more of me around here in the future. Thanks again bps119!
Click to expand...
Click to collapse
Well, my Skyrocket arrived, looked great and appeared to be "new"... I fired it up and everything looked fine, but it wouldn't recognize the SIM card, just said "NO SIM INSTALLED - EMERGENCY CALLING ONLY" and wouldn't let me do anything in mobile networks at all (said something about must be registered to a network first), so I popped in an actual AT&T SIM, same result, and both SIM cards work in my old HTC Aria. Called the guy I bought it from on eBay, have to send it back and he will send me another new one. Hope this isn't a bad omen.
That sucks man, kinda takes the excitement out of getting the new phone. Oh well, forget it ever happened and hope that it was just a fluke.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
Honestly, you'll love the skyrocket. I've had mine for a little over a year and a half and it's more up-to-date than my girlfriend's s3. It's faster and lasts longer on battery as well. Although her s3 isn't rooted, being a newer device, you would think it would work better than mine. Not the case!
If you're trying to unlock your phone, there is an unlocking thread you could check out, although I'm not on touchwiz so I couldn't do it, others have had success with it so you shouldn't have to worry there. We're a great community, just like we've been when I first rooted a year and a half ago. Enjoy!