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Unable to boot up until I plug my G2x into my notebook for 2 seconds. Normal?

Hey all,
I've got a rather funky bug going on here. I'm told it's not uncommon for G2x phones to suddenly turn off and require users to take out the battery for a reboot. But I recently ran into a super weird issue.
Tried to use my phone, encountered a black screen. Tried to turn it on, even took out battery and placed it back in with no luck. Went home and plugged it into adapter, got a screen showing the battery charging but that's it. With the battery out, pressed the boot screen, got the white LG logo before it turned off again.
Problem was solved as soon as I plugged the phone into my notebook instead. Booted up normally with no problems!
Is this a common occurrence?
If this problem persists, I might have to sell this phone (bought it on fleabay) and get a different one. Dang LG really rushed the G2x in spite of flaws!
If that happens, I'll be needing recommendations for a new phone.

I don't think this issue is common, this is my 1st time reading about it, and it certainly hasn't happened to me! good luck, if you're changing phones I'd suggest the galaxy Nexus

jj_z1 said:
I don't think this issue is common, this is my 1st time reading about it, and it certainly hasn't happened to me! good luck, if you're changing phones I'd suggest the galaxy Nexus
Click to expand...
Click to collapse
GSN is too expensive for me. Was hoping for under $300.
Was contemplating the G4SG, but I hear that while having fewer bugs, it's also a lot slower overall. I can't live without my cheap dualcore!

That's an odd one, a couple of things I will say:
I've noticed that for me if I have it plugged in and powered down then try to boot it, the thing won't start. I have to unplug it, boot it and plug it back in once it's started up initially.
Also, if you're considering loading a custom ROM, do it and if the thing is still acting like that, throw it at the nearest T-mobile store, and be sure to hit someone with it.

Волк said:
That's an odd one, a couple of things I will say:
I've noticed that for me if I have it plugged in and powered down then try to boot it, the thing won't start. I have to unplug it, boot it and plug it back in once it's started up initially.
Also, if you're considering loading a custom ROM, do it and if the thing is still acting like that, throw it at the nearest T-mobile store, and be sure to hit someone with it.
Click to expand...
Click to collapse
It was rooted with Tsugi. I haven't had any other issues yet. Rooted/flashed it yesterday, this is the 2nd day in.
And I don't have a receipt for the phone. Bought it used from another person. :/

zeth006 said:
It was rooted with Tsugi. I haven't had any other issues yet. Rooted/flashed it yesterday, this is the 2nd day in.
And I don't have a receipt for the phone. Bought it used from another person. :/
Click to expand...
Click to collapse
Try a different ROM, didn't you buy it off E-bay? If nothing else, either e-bay or paypal (assuming you used it) should cover you if you were given a lemon.

Волк said:
Try a different ROM, didn't you buy it off E-bay? If nothing else, either e-bay or paypal (assuming you used it) should cover you if you were given a lemon.
Click to expand...
Click to collapse
I'll see what happens. If the phone turns out to be a lemon, I'm going to request a refund and go the paypal dispute route if I must. I'd rather not have to.
It's a real shame too. This is a really nice phone.

Flash phoenixblood 1.7 rom and use faux123 stock cm or DS. 0.4.8 kernel, I can almost 100% guarantee you that will solve your problem.
Sent from my LG-P999 using xda premium

something similar happens to me never tried the rom your on but what i did to fix was: Settings>Applications>Development> check stay awake it helped me out maybe it will help you. let me know how everything goes.

zeth006 said:
GSN is too expensive for me. Was hoping for under $300.
Was contemplating the G4SG, but I hear that while having fewer bugs, it's also a lot slower overall. I can't live without my cheap dualcore!
Click to expand...
Click to collapse
I actually just sold my g2x and went back to my GS4G and don't regret it. Running octane 3.0 the speed difference is so negligible you won't even notice it unless your comparing them side by side.
Sent from my SGH-T959V using xda premium

If it happens again then sell it, the only thing that makes this phone unable to compete with the Galaxy Nexus is that it doesn't have ICS yet, and the screen is smaller and in lower resolution. But I believe if you get a good one then performance is better than the Gnex seeing as the highest clock speed I've seen achievable and stable for the Gnex is 1.35, and the GPU is slow and outdated. The camera on the G2x is also higher resolution, but lacks the lagless shutter.
This phone may be cheap, but it is very powerful. The only reason it had so many complaints is poor quality control, and very bad software developers. Hardware is crazy though.
If you were to sell your G2x, I'd take the Galaxy S II HD version over the Gnex.

Side effects from installing slim to my SGS4G

I installed the slim common and Slim galaxy s 4g custom rom for my SGS4G phone. I was awesome. Great features like screenshot and fast charge. However I noticed side effects similar what everyone else has noticed like the battery drain problem. I was wondering though. Has anyone been having battery issues in general like battery saying its completely charged but it wasnt and then the phone cutting off on you randomly or the phone giving false readings of the battery saying its 84% then 60% the 94%.? I thought maybe it was my phone so I brought the same exact phone and the same problems occurred. Just curious. Are there any tweaks for these problems? I have Samsung galxaxy s 4g and I installed the slim custom rom by team kick ass. Awesome rom BTW good job guys

Those are signs that your battery is going bad. You bought another phone to test?? Did you buy another battery?

hechoen said:
Those are signs that your battery is going bad. You bought another phone to test?? Did you buy another battery?
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Yes I bought another phone brand new not refurbished and I'm going to buy another one tonight. I was just wondering if I flashed this new one will I have the same side effects.

Vell123 said:
Yes I bought another phone brand new not refurbished and I'm going to buy another one tonight. I was just wondering if I flashed this new one will I have the same side effects.
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Click to collapse
Everything should be normal. I good trick to clear the phone before you put a new battery in is to hold the power button for 20 seconds or so without the battery in the phone. Then pop in the new battery and FULLY charge it with the phone still off. Turn on your phone and enjoy your new battery.

Also I wanted to know is their anyway to keep some of the old features from the galaxy s 4g like the camera. Its amazing but the ics camera app is horrible..

Vell123 said:
Also I wanted to know is their anyway to keep some of the old features from the galaxy s 4g like the camera. Its amazing but the ics camera app is horrible..
Click to expand...
Click to collapse
How is the ICS camera horrible? I find it faster and more options.

Prospective new s3 user here - root, tethering, ROM on 4.4.2?

I'm currently on a Moto x (2013), coming from a Galaxy Nexus. I switched because I needed a faster phone, and the GN hardware is just too dated. The moto x seemed perfect, until I found out I can't tether, root, or unlock the bootloader to save my life.
That being said, I'm in the market for a Verizon S3, which will likely already have 4.4.2 installed. My main concern is root access and native hotspot tethering (unlimited data). The following are what I have found thus far:
1) root: http://www.andromods.com/root-unlock/sch-i535-vzw-galaxy-s3-kitkat-rooted-nc1-ota.html
2) tethering: https://www.youtube.com/watch?v=PxBRrsucdLo <---- the guy who created the vid doesn't have VZN, so was hoping someone here can verify if that works.
3) bootloader: I found nothing on unlocking a VZN bootloader, but this is the least of my concerns
4) ROM: http://forum.xda-developers.com/gal...nt/rom-superliterom-v1-0-i535vrudne1-t2805797
My assumption was always that an unlocked bootloader was necessary to flash ROMs through custom recoveries. I'm unfamiliar with safestrap, but I'm all in for a bit of reading and enlightening.
Again, I don't necessarily need a custom ROM or bootloader. My main concerns are still tethering (main priority) and root access (second priority)
Thanks all, and I definitely appreciate any help at all!

rice923 said:
I'm currently on a Moto x (2013), coming from a Galaxy Nexus. I switched because I needed a faster phone, and the GN hardware is just too dated. The moto x seemed perfect, until I found out I can't tether, root, or unlock the bootloader to save my life.
That being said, I'm in the market for a Verizon S3, which will likely already have 4.4.2 installed. My main concern is root access and native hotspot tethering (unlimited data). The following are what I have found thus far:
1) root: http://www.andromods.com/root-unlock/sch-i535-vzw-galaxy-s3-kitkat-rooted-nc1-ota.html
2) tethering: https://www.youtube.com/watch?v=PxBRrsucdLo <---- the guy who created the vid doesn't have VZN, so was hoping someone here can verify if that works.
3) bootloader: I found nothing on unlocking a VZN bootloader, but this is the least of my concerns
4) ROM: http://forum.xda-developers.com/gal...nt/rom-superliterom-v1-0-i535vrudne1-t2805797
My assumption was always that an unlocked bootloader was necessary to flash ROMs through custom recoveries. I'm unfamiliar with safestrap, but I'm all in for a bit of reading and enlightening.
Again, I don't necessarily need a custom ROM or bootloader. My main concerns are still tethering (main priority) and root access (second priority)
Thanks all, and I definitely appreciate any help at all!
Click to expand...
Click to collapse
Root is still possible. Tethering *USED* to work on stock by using the FoxFi app. I haven't tested it in quite some time though. There's a limit for the free version, use it for testing though.
Sent from my SCH-I535 using XDA Free mobile app

I actually made the jump already. Sending this from my s3, boot loader unlocked, twrp, and running cm11.
Thoroughly enjoying this! Tether is flawless too

rice923 said:
I actually made the jump already. Sending this from my s3, boot loader unlocked, twrp, and running cm11.
Thoroughly enjoying this! Tether is flawless too
Click to expand...
Click to collapse
Do tell how. Especially if you did start with a Verizon galaxy s3 sgh-i535 that was not rooted and was running on stock Verizon Android 4.4.2

To clarify, I bought it set up this way. I knew clearly well that I wouldn't be able to get any of this with stock 4.4.2.
On the other hand though, the camera won't focus correctly when taking pics, and the charging is ridiculously slow. My only two complaints

rice923 said:
To clarify, I bought it set up this way. I knew clearly well that I wouldn't be able to get any of this with stock 4.4.2.
On the other hand though, the camera won't focus correctly when taking pics, and the charging is ridiculously slow. My only two complaints
Click to expand...
Click to collapse
Hey Rice,
I'm still on the GNex, but my wife just offered up her old GS3. It's still on 4.1.2 unlocked, rooted. I'm working on bringing it up to speed...still reading....
P.S. Is there no kernel fast charge option?

Rushead said:
Hey Rice,
I'm still on the GNex, but my wife just offered up her old GS3. It's still on 4.1.2 unlocked, rooted. I'm working on bringing it up to speed...still reading....
P.S. Is there no kernel fast charge option?
Click to expand...
Click to collapse
I remember seeing you around MWs FML thread! 5.0 is looking decent over there, so I'm very happy for them.
If you get the chance, I'd definitely recommend CM11. It make me feel like I'm running a nexus device again, except significantly faster than the gnex with a better camera.
Regarding the charging speed, I don't think it's a kernel issue. With the phone plugged in, I keep getting notifications that it's being disconnectedAnd reconnected spontaneously. I've done some reading and and it seems there is a bit of oxidation or hardware issue within the charging port. The port also requires soldering of the mother board to change. I've resorted to ordering some qi chargers[emoji106]
As for the camera, this seems to be an old issue of cm11. I flashed a camera fix zip, but to no avail. The focus issue seems to be problematic only at macro distances though. I can't find a fix besides touching to focus prior to taking macro shots

Rushead said:
Hey Rice,
I'm still on the GNex, but my wife just offered up her old GS3. It's still on 4.1.2 unlocked, rooted. I'm working on bringing it up to speed...still reading....
P.S. Is there no kernel fast charge option?
Click to expand...
Click to collapse
With 4.4.2 if that's what your referring to you can't change the kernel like those of us who are unlocked
From my CM11 S3

ShapesBlue said:
With 4.4.2 if that's what your referring to you can't change the kernel like those of us who are unlocked
From my CM11 S3
Click to expand...
Click to collapse
No, it's 4.1.2 I put her on Andy bonestock years ago and never touched it again.

Rushead said:
No, it's 4.1.2 I put her on Andy bonestock years ago and never touched it again.
Click to expand...
Click to collapse
Then yes there are several kernel options for fast charge. I know of lean kernel and ktoonsez off hand that are
From my CM11 S3

Don't want to start a new thread even though the title is irrelevant at this point, but was hoping someone could chime in regarding the camera auto focus issue. The camera focuses beautifully when I touch the screen, or when I allow it to autofocus. When I proceed to take the pic, it will try to focus again and take the pic right as it's completely blurry. This happens on both the stock CM11 camera and google camera.
I tried to flash the zip mentioned here http://forum.cyanogenmod.org/topic/85493-camera-wont-focus-cm11/ and nothing has improved.
Does anyone have any insight about this? These symptoms are identical to what many have mentioned in the thread above, so this is certainly not an isolated incident. Thoughts or input?

Who reads titles anyway?
I flashed Slim, and messed around with the camera a little, but I had wifi issues and am in the process of flashing cm11 11-09.
On Slim, the camera seemed to work fine. I took some "macro-esque" shots of text that came out pretty good (at least as good as the GNex, if not better).
I'll let you know how it fares with cm11...
So far, camera FCs on hitting the "No Thanks" button for location reporting.
OK, Camera is now functional (probably didn't wait long enough for the phone to settle on initial setup). The quality is mediocre. I'm still messing with it and will report back.

switching phones, want to keep/root the old Galaxy s3 as a lab/toy
Have an old Verizon Galaxy S3. Just got a new TMo Sony Xperia Z3 (which I am liking so far).
Will soon disconnect my Verizon service. Would like to root the S3 and use it wifi only as a experiment/toy thing, since there's no trade in value (cracked screen).
Possible? Cyanogenmod recommended?
I'm a total n00b at all this, and would steer totally clear of it for my main driver. But since I don't really NEED this phone anymore, thought this would be a safe way to dip my toes in. If I brick it in the process, no great loss.
Any advice or links would be much appreciated. Definitely want it to keep working as a wifi device and not brick once I cancel my Verizon service. Would be cool to be able to play with some of the fringier apps that require root. Those are my only requirements. Camera, cell service, etc all unnecessary. But do need wifi and don't want to create a big vulnerability to the rest of my home wifi network from this device once I'm done.
Thanks again!

evbb, depending on your current OS version, you might be able to root. If you are on the most current official OS, then you will likely just be staying with that.
Rushead, any update on how CM11 11-09 is going? If everything looks stable, I think I'll make the jump to that build.
Update about my charging times: The phone seems to charge at a normal rate if I use a 12V car charger made by Griffin (item does not specify amperage). I don't believe amperage has antying to do with my situation, as I've been yielding miserably slow charge times with the Nexus 7 (2.1 amp) charger. The phone is also very picky with cables. I've used 4 different AC adapters so far in different combinations with 4 different USB cables. I don't know what to think of my charging situation anymore...

When my wife had the phone it was extremely loose as far as cables went. I could use virtually any cable whereas my GNex is super picky.
I haven't had much time to mess with the camera yet. I'm using it as a WiFi device, too, so I can't comment on data, signal, etc. But so far it seems pretty stable. The battery drain is excessive imo. On standby for most of the day, battery was dead by 10pm. That's factory kernel.

For those looking for a decent tethering app there's one on sale, free on the Amazon app store. Easy Tether is the name of the app. It's free 11/14 & 11/15
http://www.amazon.com/s/ref=amb_lin...d_t=101&pf_rd_p=1973721462&pf_rd_i=2350149011
From my CM11 S3

rice923 said:
I've used 4 different AC adapters so far in different combinations with 4 different USB cables. I don't know what to think of my charging situation anymore...
Click to expand...
Click to collapse
You should try a very specific type of cable. The problem is the fact that you use a data cable at all. What I use is an aftermarket universal USB cable and it has the detachable tip for other phones. What this does is force the phone in "Charging (AC)" mode no matter what charger you use. Attached are 2 pictures to help identify exactly the kind of cable to solve your issue. I can charge my 7000 mah battery attached to my phone in 5 - 6 hours. A 2100 ah battery should be 1 - 2 hours with this.
Sent from my SCH-I535 using XDA Free mobile app

Some chargers identify as a USB hub rather than an AC adapter, and others do not. This is why on some chargers, it still charges slow. If ever the phone thinks it is on USB, it will not allow more than 650mah to pass through the cable. So even if you had a 10amp charger, it would not use that much if it identified as a hub.
Using the cable I mentioned removes the ability for any charger to send the identifier info to the phone. Reason? You are missing the data+/- cables that data is transmitted through. Only the +/-5v wires remain.
Sent from my SCH-I535 using XDA Free mobile app

But why would the phone have a constant disconnection and reconnection while being plugged in? That's the part that confuses me.
Regardless, I just received my qi charge in the mail! It's been pretty nice so far! I'm happy to answer any questions about it if anyone is interested

Rushead, wanted to give you a heads-up about the latest CM11 build I used. I clean flashed 11-15 and everything was great except for the camera, which consistently gave me a "cannot connect to camera" error. Otherwise, it seemed like a great build with some great options. I gave up and clean flashed 01-15. Camera is all great except for the autofocus issue mentioned before. GPS lock is great, and battery life is loads better than my GNex days.
Regarding my qi chargers, I am pulling a net positive charge of 315mA on my house charger (Nexus 7 2.1amp AC adapter). This is with the phone turned on, connected to Wi-Fi, screen off, and doing nothing.
My car qi charger is doing about the same. I ran the GPS with screen on (auto brightness) and the charger only charged the phone 3% in 2 hours with screen on and GPS running the whole time. I might switch the DC socket to the included one to see if I get better results.

confused

Hi all,
I'm confused and very hesitant about upgrading , I have a note 4 and like I said I'm very hesitant and reluctant to upgrade because I don't want to be a slave to a charger.....this is the number one reasons I hate Iphones besides not being able to expand the memory you can't switch out the battery, and you become as I stated a slave to a charger. Also I want to know if you are rooted & running the latest software does it make a difference what device you have? I know a friend of mine who has an s6 and I know one who has a note 5&6 their constantly charging it because the battery is constantly dying. can anyone tell me why I should upgrade to a note 5 if I cant expand the memory?
Can anyone tell me weather I'm doing the right thing, Or can anyone tell me anything to rest aside my fears concerning upgrading. ......thanks

srdryl said:
Hi all,
I'm confused and very hesitant about upgrading , I have a note 4 and like I said I'm very hesitant and reluctant to upgrade because I don't want to be a slave to a charger.....this is one of the reasons I hate Iphones besides not being able to expand the memory you can't switch out the battery, and you become as I stated a slave to a charger. I know a friend of mine who has an s6 and I know one who has a note 5&6 their constantly charging it because the battery is constantly dying.
Can anyone tell me weather I'm doing the right thing, Or can anyone tell me anything to rest aside my fears concerning upgrading. ......thanks
Click to expand...
Click to collapse
Best phone I've ever owned. Have a 64gb model. I have great battery life, of course I am rooted with my custom ROM.

rmarinella said:
Best phone I've ever owned. Have a 64gb model. I have great battery life, of course I am rooted with my custom ROM.
Click to expand...
Click to collapse
How did you root it w/o being able to take off the back or taking out the battery especially if it overheats ?
A friend of mine just got a brand new note 5 & a s7 & she's complaining the battery is over heating & dying quick.

srdryl said:
How did you root it w/o being able to take off the back or taking out the battery especially if it overheats ?
A friend of mine just got a brand new note 5 & a s7 & she's complaining the battery is over heating & dying quick.
Click to expand...
Click to collapse
Well, I was trying to help. Perhaps a better choice would be a Samsung Jitterbug.

The Note5 is an amazing phone. I wish there weren't as many variants around the world, so that the development was consolidated, though...
Anyway! You don't need to take out the battery to root. You cannot access the battery with this phone. If it overheats, and I don't think mine ever has, it will just shut off (theoretically), or you can hold down power, home, and down volume buttons to reboot it.
If you wait a few weeks, the market will be flooded with used Note5's, so you might be able to pick one up for cheap.

Just wait until the Note 8

rmarinella said:
Well, I was trying to help. Perhaps a better choice would be a Samsung Jitterbug.
Click to expand...
Click to collapse
ROFL. I'm dead!

In us but allways got exnos version cause I require root but hated the lack of carrier aggravation. Now seems snapdragon is root able. Whitch to get

Just wanted to find some opinions on what to get basically it's been awhile since I was on her and my note ten is having the cold battery can't charge issue so Im looking what to replace it with and need root and loved the functionality of a fully unlocked bootloader but I missed the great speeds of a US phone since I'm in the US so wonder what I shoud do?

Too cold, won't charge?
You think it's a mobo failure on the 10+?
I've never seen that warning. Use something like DevChek to view all the sensor temperatures.
May just be a battery failure. They're good for about 2 years on a heavily used phone, my lasted 1.5 years and failed.
I'm looking at getting a second Note. My choices are another 10+ or a new 20U. It will likely be another 10+; it a solid, stable, fast phone with no glaring issues. If still running on Pie, that's a huge plus, Android 10 and especially 11 just suck. I don't have high hopes for 12.
So if it's the battery or C port PCB*, just replace and wait for the 2022 Note release.
From what I've read the Snapdragon has a better chipset architecture and instruction set.
They seem to be notoriously hard to root. Probably not a good choice for rooting.
I know you can optimize a stock 10+/Pie, not sure how well that will go with Android 10 and above. Some of the functionality isn't there for valuable 3rd party apps like Karma Firewall's logging feature. You can still use Package Disabler or ADB edits to kill the bloatware though.
On newer high dollar phones is many ways rooting is a liability especially with warranty/insurance and you lose Knox, Samsung Pass etc if you use that junk. There are those especially on this forum that swear by it but won't acknowledge their cost in time (which can be and typically is huge) and inconvenience.
Stock Androids/roms are easier to troubleshoot and more secure. If there are issues with a stock setup there will be thousands or more with the same issue making solutions more likely and easier to find. With a custom setup you are on your own which can quickly implode into a time sucking blackhole in more ways than there are stars.
If I was going to root it be an older Note... not a brand new one... risk/time vs reward.
*the C port PCB may have a temperature sensor, not sure. It can cause a lot of bizarre issues in seemingly unrelated systems like internet connection, I know that for a fact. Make sure if you do replace it you get the exact PN that on that PCB or it will not function properly! Both the battery and C port PCB are relatively easy to replace with the proper tools and skillset. Both are cheap, under $50. Make sure you replace the back cover OEM seal with the same or equivalent if you open it up. Do not use generic double sided adhesive tape!

And the award for Longest Post Title and Longest Run On Sentence In A XDA Post goes to...
*Nervously opens envelope*
@ressegger !!!
*Raucous applause*

ressegger said:
Just wanted to find some opinions on what to get basically it's been awhile since I was on her and my note ten is having the cold battery can't charge issue so Im looking what to replace it with and need root and loved the functionality of a fully unlocked bootloader but I missed the great speeds of a US phone since I'm in the US so wonder what I shoud do?
Click to expand...
Click to collapse
Yes ,
i had this same issue of yours ,
"to cold to charge" can't charge ,
notice/issue .....many years back .
Can't remember which device of mine it was , think it was a Samsung Tablet A 2016 .
Anyway ,
Took devices to Samsung Service Centre.
It was the USB charging port .
They did not charge me much for the repairs .
Got it fixed and device charging normally / working fine afterwards.
My point is whatever you do or decide do not "throw/give "device away .
It's a small fix.....!
good luck

I am running the US snapdragon spammy 20 - ultra rooted up with boot loader unlocked thanks to afane and his advanced bros, although due to the lock down on many features such as scoped (controlled) storage preventing apps from being installed outside of the control room (googel store), did I mention notification sound got locked down too?