Signal Dropping Constantly - AT&T Samsung Galaxy S II Skyrocket SGH-I727

Hello,
I'm at a point where I don't know what else to do. My signal is dropping and or changing from H to H+ to 3G to no connection constantly. I'm supposed to be on LTE. Everything had been working fine until this morning.
Here is what I've done to try and fix the problem:
- re-flashed ROM (Liquid Smooth, Paranoid Android, etc) Same results. And when I say I re-flashed I mean I started from scratch, cleared everything, etc.
- flashed different modems (3)
- went back to stock
- went to AT&T and tried a new SIM card
- pulled battery, pulled SIM, etc
Everything leads back to the same performance which is that my signal is not stable. I'm in NYC so I know my signal should be stable. It has been every day until today. And of course I did speak with ATT when I was there today and they said that there are no issues. I know they're right because every phone in there was getting LTE.
So now I'm thinking it's a physical problem with the phone?
Any advice is welcome. Thanks in advance.
-Tony

tonyfiore75 said:
Hello,
I'm at a point where I don't know what else to do. My signal is dropping and or changing from H to H+ to 3G to no connection constantly. I'm supposed to be on LTE. Everything had been working fine until this morning.
Here is what I've done to try and fix the problem:
- re-flashed ROM (Liquid Smooth, Paranoid Android, etc) Same results. And when I say I re-flashed I mean I started from scratch, cleared everything, etc.
- flashed different modems (3)
- went back to stock
- went to AT&T and tried a new SIM card
- pulled battery, pulled SIM, etc
Everything leads back to the same performance which is that my signal is not stable. I'm in NYC so I know my signal should be stable. It has been every day until today. And of course I did speak with ATT when I was there today and they said that there are no issues. I know they're right because every phone in there was getting LTE.
So now I'm thinking it's a physical problem with the phone?
Any advice is welcome. Thanks in advance.
-Tony
Click to expand...
Click to collapse
Hey tony i know the isues you having but one thing you have to understand is that Network carriers Label the 4G logos"4g" although you maybe in a Hspa/Hspa+ location(which is more of a 3g+) lol
as for the data connection drop this has been an issue with JB for awhile where the apns wont stick either on boot or time out etc.....
best bet to know if its your phone or not is to revert to stock and test it if stock keeps the data connection then you know the phone is fine if it doesnt then its just apart of JB issues more then half of JB runners run into this issue.

He did go back to stock...
If the issue is still happening on stock, I'd say have AT&T replace the phone.
Sent from my Slim Bean Skyrocket
Quando Omni Flunkus Moritati

Thanks for the replies.
Yes, at this point I've done everything I could think of with regard to trying different scenarios. I'm definitely leaning towards the fact that perhaps the phone itself is on the fritz. Unfortunately the phone is out of warranty so I can't just have it replaced. I'm not due for an upgrade until June. And I don't have insurance on the phone. That sort of limits my options. AT&T did credit me $100 for my troubles, which is better than nothing. For an early upgrade I'd have to pay like $250, I believe (minus the $100 credit) in addition to renewing my contract with AT&T. Just thought I'd give you guys the breakdown.

Also, I want to reiterate the fact that I am in midtown Manhattan (NYC) where the signal is always full bars of LTE service. It's been consistent for months. This started yesterday (the signal drops) and has been inconsistent ever since. Obviously I've polled other AT&T users around me and they are not having any connection issues. And yes, I'v e gone back to stock more than once. The signal definitely comes and goes constantly. It's not just what the meter says on top of the screen. I use an application to see what mobile network I'm connected to and I'm getting the same inconsistencies looking there as I do when I look up at the signal meter in the status bar.

I had this happen too. Turned out my phone was broke.
I've got best buy's warranty and they replaced the phone. Sorry I'm not more help, but the fact that the phone just doesn't get a signal is a possibility. And I just wanted to let you know, you're not alone
Sent from my SAMSUNG-SGH-I727 using xda app-developers app

Related

No signal - Reflashed 3 times

Today my phone has been switching from no signal to signal
and now it refuses to get any signal
i have tried changing the radio
reflashed stock rom
then reflashed a modded rom
and each one has the same result ...
any other ideas what could be wrong?
i get signal if i put the sim in another phone
so its definately phone related
make sure the radio matches the rilphone.dll?
yep
same .dll from the radio package
have a feeling its some internal problem
cuz the sim is fine otherwise
grr
What about Edge?
I had a LOT of frustrations with mine a couple of weeks ago, then, just to play a hunch, I disabled 3G, and went back to edge and it worked perfectly. Sent an email to the deathstar, and they sent back saying they were having 3G problems. Reading over on boygeniusreport.com, a LOT of people are having trouble with 3G. At&t doesn't have the bandwith to support all the apple iPhone fanboys I guess.
Probably not what's causing your issue, but might be worth a try...save you from pulling your hair out.
Vish112 said:
Today my phone has been switching from no signal to signal
and now it refuses to get any signal
i have tried changing the radio
reflashed stock rom
then reflashed a modded rom
and each one has the same result ...
any other ideas what could be wrong?
i get signal if i put the sim in another phone
so its definately phone related
Click to expand...
Click to collapse
First Take your Phone out of the Faraday Cage.
p51d007 said:
I had a LOT of frustrations with mine a couple of weeks ago, then, just to play a hunch, I disabled 3G, and went back to edge and it worked perfectly. Sent an email to the deathstar, and they sent back saying they were having 3G problems. Reading over on boygeniusreport.com, a LOT of people are having trouble with 3G. At&t doesn't have the bandwith to support all the apple iPhone fanboys I guess.
Probably not what's causing your issue, but might be worth a try...save you from pulling your hair out.
Click to expand...
Click to collapse
If this doesn't help, disabling 3G, you may have to do a warranty exchange.
left battery out all night (last night)
then i reconneced it this morning
and everything seems to working fine
must have been some internal static
thanks dudes

HTC ONE APN problems after Root

Hi Guys,
Just switched over from the Iphone and liking the Android platform so far. So in my tinkering quest, I think something got screwed up with my APN.
I flashed ViperOne 3.1 to my HTC One (T-Mobile phone, but I am using an AT&T SIM) with 4.3. Radio. 4A.21.3263.03 with the latest firmware from Tmobile (side note, Im still not sure if/how the firmware changes when flashing a new/custom ROM).
Anyway, I flashed Viperone and everything went fine and updated the new APN for ATT. With the stock phone, I had been using the "pta" APN and got great reception and LTE speeds. With the Viperone initial flash, same reception, same speeds.
Next, I realized I didn't install the Superuser stuff so I thought I had to reflash everything...which I did. On the 2nd go around, now I can't get the pta APN to work. I get cell service (same reception as before with full bars, but no data). The only way to get data and cell is use the phone APN but cell is 3G (>1mb) and 1 bar at best.
The only thing I remember doing that could have possibly screwed something up inbetween the two flashes of Viperone, is that I installed AdAway. Not sure it this would effect anything or not.
I've also tried totally wiping the phone and installing Viperone for a third time via a sideload. I have not tried going back to a completely, locked stock phone yet. Also, tried loading AndroidRevoltion but same deal. But given I am a noob, I am still a bit worried about screwing something else up flashing back to a stock locked TMobile phone.
Any ideas on how to fix the APN issues? I have tried all settings in this thread: http://forum.xda-developers.com/showthread.php?t=2172110
As well as a couple others and combos, but nada.
Anybody? Nobody?
Some more info, I took my phone down the street and messed around a bit at a local coffee shop. I was amazed when I didn't change anything and I got a whopping 46mb downspeed. Haven't really seen that in my area. Still only had 2 signal bars when everywhere else is usual 5. I am in San Diego so coverage is never an issue. Anyway, I then traveled about 10 blocks away to run an errand and it dropped back down to under 1mb. Same 1-2 bars. Something is definitely funky. The phone and data works. talking on it seems fine, just doing any network data stuff is very slow other than that one instance.

[Q] Horrible reception-- new phone development

I've started having some horrible issues with my phone connecting to Verizon networks properly. I used to be able to connect to 4G networks at my house and surrounding area with no issue, but now I've been having the worst time getting it to lock. Currently I'm connected to 3G at -99dBm in my household.
I originally was running stock, but fully rooted, S-Off. I've since switched to trying AOKP and now I've settled on Sinless GPe 3.4.7. I have not seen any real difference between them as far as getting a good connection to the network. I started switching ROMs well after I've noticed an issue, and I have not done much of anything to my phone in the last few weeks that I could attribute to the change. I've never dropped the phone or damaged it in any way.
I just recently traveled across the state and would run speedtests next to my wife's iPhone 5c and 19/20 times she'd show full bars with LTE service while I was either on 3G or no service at all. My phone will connect to 4G sometimes though, it's just not that often.
I read that there may be an issue with my SIM card, so I stopped in and had it replaced. The guy seemed very confused about the state of my phone software, so he blamed any issue I was having on the software installed. Regardless I did get a new SIM card installed. It did not seem to help at all. Can anybody help me? I'd hope to not have to go through the hassle of attempting to get the phone replaced!
Bootloader information:
HBoot-3.16.0.0000
Radio-0.89.20.0321
After rebooting my phone, my phone locked to an LTE signal at -112dBm. It does not speed test at over 3Mbps. Testing my wife's iPhone shows her at -100dBm and she was able to pull 30Mbps down.
There is talk of poor signal reception/speed in gpe threads. Cm based Roms, dunno. Try flashing a sense ROM, do some tests and report back
I recommend clean ROM or any other ROM on Verizon base
I just received my M8 yesterday and am having the same issues (both wifi and LTE) running the latest PA. Going to try something with a VZW base and report back.
wtoj34 said:
There is talk of poor signal reception/speed in gpe threads. Cm based Roms, dunno. Try flashing a sense ROM, do some tests and report back
I recommend clean ROM or any other ROM on Verizon base
Click to expand...
Click to collapse
I reloaded my backup of the Stock ROM and I am still seeing the same issues. It seems to connect sometimes but most of the time it will not. It seems like its just not getting a good lock. I am having trouble even using the phone at my house now whereas I've always had great service here. Doing a speed test now, the phone states 3G service, tested with 705 ping, download of 0.17, upload shot up to 58.19 (which obviously isn't true) and then froze while testing and has been here for over three minutes.
serotoninzero said:
I reloaded my backup of the Stock ROM and I am still seeing the same issues. It seems to connect sometimes but most of the time it will not. It seems like its just not getting a good lock. I am having trouble even using the phone at my house now whereas I've always had great service here. Doing a speed test now, the phone states 3G service, tested with 705 ping, download of 0.17, upload shot up to 58.19 (which obviously isn't true) and then froze while testing and has been here for over three minutes.
Click to expand...
Click to collapse
I would run the RUU and try again, and just see if something got boogered
Confirming as well that the reception isn't the greatest with this phone/radio in the so so service areas.
I live out in the country. Never had good reception with Sprint no matter the phone. Switched to Verizon with an LG G2 and service was fantastic at home for the 7 months I owned it. I moved to the M8 and now phone service is spotty at my house. It's the radio for sure. Wifes verizon moto works great at home as well.
I've had the same issue, updated radios, flash back to stock, and everything else. The radio on this phone IMO is terrible, even when it does get 4G I get like 8 mbps down with 4 bars of 4g. Once in a great while i'll get 18 - 20 down with 5 bars of 4g.
I've been experiencing the same things recently as well. It also affects sending SMS messages. I am on stock too (with s-off). Nothing changed on my phone though, it just started dying.
Never had signal issues. I live out in the boonies too. Signal is strong and switching between 3g and 4g has been smooth. I've been able to download torrents as fast as 5mb/s. Speed test results have been just awesome. As far as signal goes, it's been better than my note 3, DNA, and my wife's droid mini. And this is my second m8. My son has the first and it is the same as mine.
I would look into exchanging them if they don't keep up with other phones. The radio in this phone is actually pretty damn sweet, so if u got a funky one, I'd exchange it. Def try the ruu first, then exchange if that doesn't help.
Sent from my HTC6525LVW using Tapatalk

[Q] No signal strength all of a sudden

Hello,
I bought my Nexus 5 on the 11th of December 2013 and it had been working flawlessly ever since. Since last week, I started noticing the occasional signal drop and I'd be out of cell reception but would usually be back up within no time. However, yesterday, out of the blue I'm travelling on the highway and my signal strength disappears never to come back again. I've tried the following:
- Restore old backup (including EFS)
- Went back to stock from PA
- Upgraded to the latest radio
- Took back cover off to see if anything was wrong but found nothing.
- Tried another SIM card
Nothing worked. My SIM card works fine in another phone. Everything else such as WiFi and Bluetooth works flawlessly but I just don't get any reception.
This is very disappointing and I have my fingers crossed hoping someone can help me with this since I didn't plan on getting a new device for at least another year especially after paying $520 USD for my phone here in my country.
Thank you for looking.
im having a similar problem with the radio after the last few otas. im getting a lot of dropped calls on 3g aws...
im going to try to revert to an old radio as i don't think this is a hardware failing issue..
Sent from my Nexus 7 using Tapatalk
Flash stock firmware with fast boot. If its the same, its a carrier issue....call them to see. Or its hardware failure.
just wanted to post my fix for this issue - very disappointed with Google that i had to do this...my provider is mobilicity canada (3g aws band fyi)
flash krt01b radio from this thread...
http://forum.xda-developers.com/showthread.php?t=2514095
this is *not* a carrier or hardware issue (at least in my case)
seems others are having same issue
https://code.google.com/p/android/i...s Owner Summary Stars&groupby=&sort=&id=70878
Then it is a carrier issue....cause on Telus in Canada....never had an issue with any radio version. ?
telus would have a stronger overall signal but uses AWS band for lte which is different than mobilicitiy 3g aws...
I'm not disagreeing.... Just saying its the carrier....not Google.
See my point?
KJ said:
I'm not disagreeing.... Just saying its the carrier....not Google.
See my point?
Click to expand...
Click to collapse
are you saying mobilicitiy is purposely weakening their cell signal cause they are almost bankrupt ?
i still blame google i had no issues with the radio before they borked it...
nolook said:
are you saying mobilicitiy is purposely weakening their cell signal cause they are almost bankrupt ?
i still blame google i had no issues with the radio before they borked it...
Click to expand...
Click to collapse
Just saying that unless many have the issue with the phone or radio, then its an issue.....if not, it isnt .
So in this case, it leaves hardware or carrier....assuming a stock flash didn't help.
If flashing another radio helps the OP...awesome!! But the new radio does work fine for the mass majority.
Hope it does work for him tho!

[Q] anybody else having 4g connection issues?

About 3 weeks ago after installing the update of liquidsmooth 4.4.4 i randomly started dropping to 3g service in places that i normally had full 4g available. It has slowly gotten worse to where if im not on wifi, than the phone is pretty much useless. i normally have full coverage everywhere. so i originally thought that maybe something had gotten messed up on the update, so i did a clean install of liquidsmooth 4.4, and blackbird kernal and same thing still occurred. also tried carbon rom and slimrom, and no luck. so for the fun of it, i went ahead and reflashed the phone back to stock from backups and rerooted it, updated the modems and reinstalled liquidsmooth w/ blackbird kernal, and same thing. i have went through all the mobile networks settings and tried everything and nothing seems to help, idk if that update screwed something up or if its an issue that others have been experiencing as well, or if im just screwed and my phone phone is dying.... any help is appreciated thanks
rideforlife7 said:
About 3 weeks ago after installing the update of liquidsmooth 4.4.4 i randomly started dropping to 3g service in places that i normally had full 4g available. It has slowly gotten worse to where if im not on wifi, than the phone is pretty much useless. i normally have full coverage everywhere. so i originally thought that maybe something had gotten messed up on the update, so i did a clean install of liquidsmooth 4.4, and blackbird kernal and same thing still occurred. also tried carbon rom and slimrom, and no luck. so for the fun of it, i went ahead and reflashed the phone back to stock from backups and rerooted it, updated the modems and reinstalled liquidsmooth w/ blackbird kernal, and same thing. i have went through all the mobile networks settings and tried everything and nothing seems to help, idk if that update screwed something up or if its an issue that others have been experiencing as well, or if im just screwed and my phone phone is dying.... any help is appreciated thanks
Click to expand...
Click to collapse
I'm currently running OmniToad, and ran CM 11M8 for a short while. On T-Mobile at least, with the custom ROMs it's normal to see H+ only when data is being transferred; it will drop back to 3G otherwise. When I ran the stock ROM on the Relay, it would always say "4G" regardless of whether it was in UMTS (3G) or HSPA+ mode. Apps like SignalCheck or CellMapper will tell you which mode it is really in.
On the other hand, if data transmission is only going through as 3G, it could be a phone issue or a tower issue. Is LTE available in your area, or are they just getting it set up? I know when T-Mobile was upgrading the Chicago area to provide LTE, there were a few glitches here and there.
It was stupid for T-Mobile to brand HSPA+ as "4G" but that's a different rant.
Bobby Tables said:
I'm currently running OmniToad, and ran CM 11M8 for a short while. On T-Mobile at least, with the custom ROMs it's normal to see H+ only when data is being transferred; it will drop back to 3G otherwise. When I ran the stock ROM on the Relay, it would always say "4G" regardless of whether it was in UMTS (3G) or HSPA+ mode. Apps like SignalCheck or CellMapper will tell you which mode it is really in.
On the other hand, if data transmission is only going through as 3G, it could be a phone issue or a tower issue. Is LTE available in your area, or are they just getting it set up? I know when T-Mobile was upgrading the Chicago area to provide LTE, there were a few glitches here and there.
It was stupid for T-Mobile to brand HSPA+ as "4G" but that's a different rant.
Click to expand...
Click to collapse
yea LTE has been in this area for quite a while now, i had it with my S4 and it worked perfectly, i never had a problem with the service on the relay either up untill a few weeks ago the internet speed and and data coverage was great, not quite as fast as the LTE on my S4 but it was still more than adequate, i used to use the hotspot and stream netflix on my laptop. now i can usually get a text to send but calls usually fail and if i try and use the internet its impossible. it almost seems like its doing the exact opposite of what it should be doing, as soon as i try and use anything (not while connected to wifi) than it drops coverage to 3g/edge/ or to nothing at all. Im leaning towards the hardware failing side, but i figured i might as well give it a shot and post it and see if maybe i wasnt alone. thank you for your reply.
small note of background on me: first time posting ever in this forum but have been using the tools and roms from it for a long time, so im not a complete noob, but i definitely still have a lot to learn.

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