Develop Bugs

[Q] LTE Trouble with ATT after root/flash

Let me begin by saying that I've looked far and wide for answers, and solutions, but haven't found any that work yet. So I'd like to go through the process of what happened, and what my fix is really going to be.
- ATT GSIII Stock 4.1.2, was rooted using the CF Auto-Root Method.
- We installed CWM Touch recovery, and flashed the rooted stock image.
- This is immediately where we started seeing issues with LTE, etc. in a known-good LTE area. We were getting "G" and "E" from that point on.
- From here, I noticed that we had lost the IMEI (was set to 0), so I followed the process to get that restored using QPST.
- After the IMEI was back to normal, nothing got better. LTE wouldn't show up, etc.
- I checked into the APNs, and there were several, so I removed the ones not needed, and kept only the one that was correct. STILL no LTE.
- At this point, since we were going to AOSP anyway, we decided to flash Slim 4.2.2 Build 8. Had the same issues, so I verified APN, Network Modes, IMEI, etc. Everything is there that needs to be.
- Once in a WHILE, we get LTE in a known-good area for a few minutes, but most of the time it's "G" or "E". Calls drop, sound is bad, etc. We tried several of the baseband modems with no desired results.
What part of this process causes this to happen to the ATT GSIII? Is it the root method? Because we had this issues so early in the rooting/flashing process, I would think whatever happened there is still an issue with the phone.
The IMEI is correct, so I don't think that can be it.. or can it? Would calls, texts, data work with an IMEI that isn't correct?
Network Mode is correct: LTE/GSM/WCDMA
CDMA Subscription is set for NV (I know this is RUIM/SIM in VZW GSIIIs). Is NV Correct? I've seen some posts about fixing NV Data.. might this be the issue?
I really have nothing else I can think of. I've been a rooted-flasher for a few years now, and root a lot of phones. I had issues with my d2vzw along the lines of the issue I'm having with the d2att phone, but I was able to fix those fairly easily.
Now I've been reading an I know these issues occur when you flash a 4.2 AOSP build.. so maybe that's when it got really bad for us? But agian, I've gone through all of the check points, and it looks as if everything is in order.
I'm flat out of ideas..
Help? I'm willing to donate, compensate, etc. And if you happen to be in NYC, could even pay someone to help fix.
Many many thanks and internets ahead of time.

I am having the same problem as yours. Been a flashaholic since the beginning of this year. Tried various custom ROMs (CM, AOKP, PA, Rootbox, Revolt, PACman, JellyBAM, Carbon, Slimbean, LiquidSmooth; you name it). Currently I'm using (and happy with) Dirty Unicorn, however earlier last month I noticed that I have not been receiving LTE. Even worse, I can't get a better data speed than EDGE. I have to mention though that I have unlocked my phone and switched to T-Mobile. I'm not sure when I started experiencing this problem since I am very sure that I had LTE on my phone two months earlier. Like you, I also had to restore my IMEI after it turned to 0. I've tried going back to stock and unrooted but that also did not help. I really hope we can find what's wrong with our phones.

Toro Network Drops, 4.2.2 and 4.3

Hey guys - my VZW Gnex (it's a refurb to replace my old one with a bad screen) has been having excessive network dropouts lately. When I boot the phone, it doesn't acquire signal for over a minute, when I place a call I lose signal afterwards, and data drops out randomly. The device will say it's connected (blue bars), although I cannot use the internet. Also, it'll randomly loose cellular connectivity, although indicate that it has signal. I'll go to send a text and it'll immediately have send errors, and I am unable to make or receive calls, even though it shows I have signal. To fix, a reboot is always necessary. This has happened on 4.3 (crDroid) and 4.2.2 (CM 10.1.3 stable). It has happened across all the different radios, 4.0.4 and up, and across several different kernels. Does anyone have suggestions, the phone isn't really usable if people can't get in touch and I'm unaware that they can't.
EDIT: When I go into the phone info menu *#*#4636*#*# when the radio has no data, it says preferred network is "unknown." If I change it, the setting immediately goes back to unknown.

U might need to go through the insurance and get another one.
Sent from my Galaxy Nexus using XDA Premium 4 mobile app

eriscentro said:
Hey guys - my VZW Gnex (it's a refurb to replace my old one with a bad screen) has been having excessive network dropouts lately. When I boot the phone, it doesn't acquire signal for over a minute, when I place a call I lose signal afterwards, and data drops out randomly. The device will say it's connected (blue bars), although I cannot use the internet. Also, it'll randomly loose cellular connectivity, although indicate that it has signal. I'll go to send a text and it'll immediately have send errors, and I am unable to make or receive calls, even though it shows I have signal. To fix, a reboot is always necessary. This has happened on 4.3 (crDroid) and 4.2.2 (CM 10.1.3 stable). It has happened across all the different radios, 4.0.4 and up, and across several different kernels. Does anyone have suggestions, the phone isn't really usable if people can't get in touch and I'm unaware that they can't.
EDIT: When I go into the phone info menu *#*#4636*#*# when the radio has no data, it says preferred network is "unknown." If I change it, the setting immediately goes back to unknown.
Click to expand...
Click to collapse
This is a known issue with 4.3 ROMs. I'm not sure about 4.2.2. It looks like CM 10.2 may have a fix for it in the next nightly. One known fix is to edit build.prop to include
ro.telepohny.default_cdma_sub=0
Thank has worked for me.

dlabadie said:
This is a known issue with 4.3 ROMs. I'm not sure about 4.2.2. It looks like CM 10.2 may have a fix for it in the next nightly. One known fix is to edit build.prop to include
ro.telepohny.default_cdma_sub=0
Thank has worked for me.
Click to expand...
Click to collapse
I've added that line, doesn't help

Why does every KK rom have data issues?

I've tried Liquidsmooth, CM Remix, Omni, and now Carbon. Every KK rom shows me the orange no data connection icon. Airplane mode toggle and wifi toggle doesn't work. Reboots only work sometimes. And that's not really a solution, rebooting my phone every 5 minutes. Why is this happening?

I only home that you switched all these ROMs with clean installs. Did you?

Of course

yea same here got a gnex on eBay having trouble getting it going ..looks like I'm going to an old ROM that my other gnex runs and at least has data connection
4.2.2. lol....
what baseband are people using for KK on gnex Verizon ?
Sent from my Galaxy Nexus using XDA Premium 4 mobile app

rsswga said:
yea same here got a gnex on eBay having trouble getting it going ..looks like I'm going to an old ROM that my other gnex runs and at least has data connection
4.2.2. lol....
what baseband are people using for KK on gnex Verizon ?
Sent from my Galaxy Nexus using XDA Premium 4 mobile app
Click to expand...
Click to collapse
yeah.. maybe your baseband version (radio.img) didnt suited you.
maybe broken driver ~ reflash kernel with wifi driver works for me. ( changing rom didnt change anything to radio/driver setting)

My old 4.2.2 JBSourcery gets signal just fine. And for some reason Omni gets better than the others but still cuts out.

Explodee said:
My old 4.2.2 JBSourcery gets signal just fine. And for some reason Omni gets better than the others but still cuts out.
Click to expand...
Click to collapse
your baseband??
sometimes when u using adblocker apps or network tweaks/mod its can easily mess your network setup. just double check if any.

Flashing roms doesnt change radios right?

the only way I can get data is if I put it right beside my network extender.
I've tried all the radios.. did I get a dud..?
sent from a violated gs3
---------- Post added at 02:13 PM ---------- Previous post was at 02:12 PM ----------
Explodee said:
Flashing roms doesnt change radios right?
Click to expand...
Click to collapse
nope
sent from a violated gs3

Explodee said:
Flashing roms doesnt change radios right?
Click to expand...
Click to collapse
rom can affects data coverage from the Rils files (in libs). usually continuously using 4.3 rils right now cause google doesn't update for gnex. gnex roms still on progress in this. CM & slim update the coverage issues so far. dont know wt others. sorry if im wrong..
http://www.slimroms.net/index.php/news/431-weekly-3-2

Explodee said:
I've tried Liquidsmooth, CM Remix, Omni, and now Carbon. Every KK rom shows me the orange no data connection icon. Airplane mode toggle and wifi toggle doesn't work. Reboots only work sometimes. And that's not really a solution, rebooting my phone every 5 minutes. Why is this happening?
Click to expand...
Click to collapse
I dont know what carrier you are on but when I was using my Verizon Galaxy Nexus, every ROM I flashed usually had no data on first boot. I got in the habit of rebooting the phone before I even went through the setup and after that, data had no issues. It was a known thing. Toggling airplane mode and 3g/LTE was also known to cause issues at one point. So if you clean flash, boot up and let it sit for a few seconds before going through the google setup. If data doesnt automatically connect, reboot right away. It should connect fine after that.

Yeah I'm on Verizon now. Hopefully making the switch to T-mo in about a month. The problem is not that data doesn't connect at all, the problem is that it will drop out and never come back. I live in Boston and in the subway I will lose the signal underground and it will never come back. Also my office is right in the main downtown area and I barely get a 3G signal no matter what. I know my signal strength isn't part of this problem. It's the data connection somehow becoming disconnected and staying idle that is stopping me from staying on KK.

Explodee said:
Yeah I'm on Verizon now. Hopefully making the switch to T-mo in about a month. The problem is not that data doesn't connect at all, the problem is that it will drop out and never come back. I live in Boston and in the subway I will lose the signal underground and it will never come back. Also my office is right in the main downtown area and I barely get a 3G signal no matter what. I know my signal strength isn't part of this problem. It's the data connection somehow becoming disconnected and staying idle that is stopping me from staying on KK.
Click to expand...
Click to collapse
Since you're on Verizon check shiny Rom. The guys there have done a lot of tweaking to improve data.
The reason data is problematic is partially since the gnex is no longer supported and the toro variant has had no officially android release since 4.2.2 and the ril and telephony stack have changed how they work with cdma in both 4.3 and 4.4. I believe the toro uses a bit of an older radio. Is this a problem when you disable 4g as well?
Sent from my HTC One using Tapatalk

I've gotta say that Shiny ROM is just about flawless. I've never had issues getting or keeping a data connection when there's signal. I'm using the FK01/FK02 radios from 4.2.2 and the 4.2 bootloader.
I'll give my little testimony here: a basic stock rom will get you farther than a fully-featured one. I've heard the expression "mo' features, mo' bugs" and that seems to fit quite well. I'm not aware of any features in any rom that you can't get from one xposed module or another, so that's what I've been doing. I'd say give it a try and see if your data issues are resolved for good.

Shiny has always worked fine for me. I run latest everything.. bootloader, radio. CM I think worked fine for me but was ugly. Paranoid Android seems to have some connectivity issues.. I wish someone could solve this data issues. Maybe it is time to leave my nexus behind Just been waiting for another verizon nexus
Explodee said:
I've tried Liquidsmooth, CM Remix, Omni, and now Carbon. Every KK rom shows me the orange no data connection icon. Airplane mode toggle and wifi toggle doesn't work. Reboots only work sometimes. And that's not really a solution, rebooting my phone every 5 minutes. Why is this happening?
Click to expand...
Click to collapse

I've got about 7 different Nandroids and have been switching between them to test. CM Remix which I believe is based on Slim seems to be working OK. I tried Slim this morning but still got a lot of data cut-outs

Explodee said:
I've got about 7 different Nandroids and have been switching between them to test. CM Remix which I believe is bases in Slim seems to be working OK. I tried Slim this morning but still got a lot of data cut-outs
Click to expand...
Click to collapse
wow.. lot of roms tested. that pretty brilliant idea for solving this. just use the best. data networks really different for each country.
* i found out a different in apn setting wt different rom. slim rom only captured 4g by my local provider (APN). when im tried asob its give choice in Apn setting ( 3g /4g). my country not fully h+ at several area. so changing to 3g got better network (better low than nothing)

memaro_maro said:
wow.. lot of roms tested. that pretty brilliant idea for solving this. just use the best. data networks really different for each country.
* i found out a different in apn setting wt different rom. slim rom only captured 4g by my local provider (APN). when im tried asob its give choice in Apn setting ( 3g /4g). my country not fully h+ at several area. so changing to 3g got better network (better low than nothing)
Click to expand...
Click to collapse
I don't think that applies to CDMA

Can't Send SMS; Can Receive SMS/MMS & Send MMS

Hey guys,
I think I've reached the point where it's time to call in the cavalry and see if anyone around here is having the same issue; there appears to be a plague going around on the Verizon network, specifically in the Pennsylvania area, preventing people from sending SMS, but still receiving fine (and 4G works fine too, for the record). MMS still sends / receives fine, but I'm unable to send SMS. There are tricks to allowing a single SMS message to go through which involves toggling Airplane mode on / off every. Single. Time. People have also had success with turning 4G off completely, using the CDMA band after a reboot at which point they can send *several*, but still end up with the same issue.
The only solution I've read about that FIXED it is by reverting back to complete stock from VZW. Performing factory resets, using other ROMs, etc etc...doesn't work. I'd REALLY rather not do this and, frankly, would rather use 3G / toggle Airplane mode for texts than use Sense and get off of my ROM (http://forum.xda-developers.com/showthread.php?t=2560831).
People from other device forums on XDA are having the same problem; the ones I've seen that are active discussions are the Samsung Galaxy S III & IV. They're mostly CM ROMs *as well as* AOSP ROMs in general.
http://forum.xda-developers.com/showthread.php?t=2532414
http://forum.xda-developers.com/showthread.php?t=2658572
SIM card replacements are a no-go, and the recorded instances seem to be in the 717 / 570 area codes, mostly. Now I DO know that VZW released an OTA update for the One recently, and I'm relatively confident that would fix the issue, but I've no idea why. I'm thinking perhaps they dispatched new radios? I looked around a bit and couldn't find any flashable zips of radios extracted from the latest OTA, that's the next step I'll be trying once that download finishes.
So is anyone else having this issue? Any word on fixes?

The newest firmware from the latest OTA can be found in the 2nd post in this thread: http://forum.xda-developers.com/showthread.php?t=2485319
If you've already flashed the latest firmware then I'm not sure what to tell you... maybe ask your favorite rom developer to take a look at the latest OTA in regards to this issue?

If it has the stock rom and OTA update why not take it to the store and let them look at it. Something might be wrong with your account.

movieman999 said:
Hey guys,
I think I've reached the point where it's time to call in the cavalry and see if anyone around here is having the same issue; there appears to be a plague going around on the Verizon network, specifically in the Pennsylvania area, preventing people from sending SMS, but still receiving fine (and 4G works fine too, for the record). MMS still sends / receives fine, but I'm unable to send SMS. There are tricks to allowing a single SMS message to go through which involves toggling Airplane mode on / off every. Single. Time. People have also had success with turning 4G off completely, using the CDMA band after a reboot at which point they can send *several*, but still end up with the same issue.
The only solution I've read about that FIXED it is by reverting back to complete stock from VZW. Performing factory resets, using other ROMs, etc etc...doesn't work. I'd REALLY rather not do this and, frankly, would rather use 3G / toggle Airplane mode for texts than use Sense and get off of my ROM (http://forum.xda-developers.com/showthread.php?t=2560831).
People from other device forums on XDA are having the same problem; the ones I've seen that are active discussions are the Samsung Galaxy S III & IV. They're mostly CM ROMs *as well as* AOSP ROMs in general.
http://forum.xda-developers.com/showthread.php?t=2532414
http://forum.xda-developers.com/showthread.php?t=2658572
SIM card replacements are a no-go, and the recorded instances seem to be in the 717 / 570 area codes, mostly. Now I DO know that VZW released an OTA update for the One recently, and I'm relatively confident that would fix the issue, but I've no idea why. I'm thinking perhaps they dispatched new radios? I looked around a bit and couldn't find any flashable zips of radios extracted from the latest OTA, that's the next step I'll be trying once that download finishes.
So is anyone else having this issue? Any word on fixes?
Click to expand...
Click to collapse
Those area codes for all phones on aosp roms are not working right now. Since 2/20/14. Has nothing to do with HTC or their firmware. I'ts a bizarre Verizon 4G issue. I am in the 717 area code with a Note 2 with the issue. I have seen others with S4 and S3. Verizon is aware of the issue and is working with another XDA member to fix it. To date it's not resolved.

DreamFX said:
Those area codes for all phones on aosp roms are not working right now. Since 2/20/14. Has nothing to do with HTC or their firmware. I'ts a bizarre Verizon 4G issue. I am in the 717 area code with a Note 2 with the issue. I have seen others with S4 and S3. Verizon is aware of the issue and is working with another XDA member to fix it. To date it's not resolved.
Click to expand...
Click to collapse
Thanks DreamFX; I've been following this thread (http://forum.xda-developers.com/showthread.php?t=2658572&page=6) lately as they seem to be the most on top of it. I can't believe Verizon has let this issue go on for so long, but given that it seems to only be relevant to those of us with AOSP ROM's, I guess it makes sense. At least I'm still able to send texts, if not only through a silly process of toggling airplane mode on / off. Hopefully it gets resolved soon...

DreamFX said:
Those area codes for all phones on aosp roms are not working right now. Since 2/20/14. Has nothing to do with HTC or their firmware. I'ts a bizarre Verizon 4G issue. I am in the 717 area code with a Note 2 with the issue. I have seen others with S4 and S3. Verizon is aware of the issue and is working with another XDA member to fix it. To date it's not resolved.
Click to expand...
Click to collapse
movieman999 said:
Thanks DreamFX; I've been following this thread (http://forum.xda-developers.com/showthread.php?t=2658572&page=6) lately as they seem to be the most on top of it. I can't believe Verizon has let this issue go on for so long, but given that it seems to only be relevant to those of us with AOSP ROM's, I guess it makes sense. At least I'm still able to send texts, if not only through a silly process of toggling airplane mode on / off. Hopefully it gets resolved soon...
Click to expand...
Click to collapse
I'm getting this too, just started for me today from what I can tell. Driving me bonkers but, Airplane mode toggle totally works for me. :cyclops:
VZW SGS4 running AOSPA with 804 area code operating in Oregon.

dickenam said:
I'm getting this too, just started for me today from what I can tell. Driving me bonkers but, Airplane mode toggle totally works for me. :cyclops:
VZW SGS4 running AOSPA with 804 area code operating in Oregon.
Click to expand...
Click to collapse
Whoa, that's weird. I really thought it was isolated to the 717 area code. It's getting pretty crazy...I've been dealing with this for a few weeks now and my patience is running thin. Unfortunately it's not like we can just report this to VZW because all anyone would tell us to do is "restore to factory", which simply isn't a solution.

movieman999 said:
Whoa, that's weird. I really thought it was isolated to the 717 area code. It's getting pretty crazy...I've been dealing with this for a few weeks now and my patience is running thin. Unfortunately it's not like we can just report this to VZW because all anyone would tell us to do is "restore to factory", which simply isn't a solution.
Click to expand...
Click to collapse
Yup, I thought so too. Just cropped up between 10a and 11a PDT. Like you said MMS is fine, simply affects SMS. And yes, restoring stock is simply not an option. Going to TMobile, however, is totally an option that I'm considering more and more often......
EDIT: AND SMS began sending properly (without workaround) for me around 8p PDT last night, just tested and still ok. RESOLVED!
EDIT EDIT: Issue now persists....sadface =[
Sent from my SCH-I545 using Tapatalk

dickenam said:
Yup, I thought so too. Just cropped up between 10a and 11a PDT. Like you said MMS is fine, simply affects SMS. And yes, restoring stock is simply not an option. Going to TMobile, however, is totally an option that I'm considering more and more often......
EDIT: AND SMS began sending properly (without workaround) for me around 8p PDT last night, just tested and still ok. RESOLVED!
EDIT EDIT: Issue now persists....sadface =[
Sent from my SCH-I545 using Tapatalk
Click to expand...
Click to collapse
IM getting it now. but not exactly the same. phone freezes without warning and I have to toggle airplane mode and restart to get it to unfreeze. this happened after the last OTA update. I am going to a custom ROM until I don't read anything about this for a while

[Q]Please Serious tech help! cellular data radio unresponsive

Look i normally dont ask for to much help ive been around a bit know more then the average bear. I also fix hardware.
My problem is my data radio will not switch on from any attempt:
Attempted solutions:
Dialed
*#*#4636#*#*
Will not switch on from that screen
Did the obvious and switched on and off airplane mode
Replaced the entire build.prop file with a very stock build.prop after flashing stock jelly bean
Repeated steps for all stock firmware
Newest attempt wiped the entire system partition through recovery forcefully bricking the phone. I have now flashed the original stock e980 stock 10p tot file still no luck
My phone is completely unlocked fully rooted.
I've replaced the data permission files.
And I know its not the SIM card because the SIM card is in the phone I'm using right now which is an LG g2 unlocked which is for sale by the way.
And if it is a hardware problem I have not found any related video or thread to help me find an exchange where the radio is on this thing
Help me please if anybody has any idea?

Cool no help, hey moderator can u move this to thread that may get more help that would be awesome

i came looking around here because my g pros radio stopped working sometime last night while i was asleep and was about to make a thread asking for help, but seeing as how you haven't got much i doubt i would either. but ill give you a little info on mine, will it help you out at all? not sure. but i know it might make me feel a little better.
I flashed Vanir 4.4.4 last week coming from Beanstalk 4.4.4 cause beanstalk was getting buggy from all the ugly mods i subjected it to. so all was well with Vanir till i woke up this morning and had no service, no calls, no network, AND even if i connected to a wifi network it seemed that i couldn't get any data from it. I tried flashing madmacks modem cause who knows, maybe thatll help, but it diddnt. So then i flashed a different kernel and changed TCP protocols cause who ****ing knows, but it did nothing. THEN i restored my older Beanstalk 4.4.4 backup sure that it would work flawlessly but guess what, same problem. Now that im back on Beanstalk i went to the "Network Operators" option under "Mobile network settings" and selected ATT, which is my service provider, i can now make calls and texts but still no data, when i did this on Vanir it did not help. So i started messing with my "preferred network type" and realized i have data on 2G, but not 3G or LTE. Im gonna take a wild guess and say that maybe if you flash your phone back to 100% stock your radio should start working again, as much as i dont want to, i might end up doing that as well.
tl:dr
similar problem, i dont really know ****, easiest option = go back to stock, hope it works.

@Fant0m3 @alb-o
Have you guys checked if your rom shows your imei?
I have had this problem twice. My IMEI disappeared and I don't know how.
Your symptoms match.
If that's the case you could take it to a repair shop and they'll fix it in a minute or two. Or, you can check around xda.

thats a good point, when i was looking around XDA earlier i saw a few mentions of it but diddnt see anything very specific and was late for class so diddnt have time to look for too long. strangely enough mine actually started working normally again after i kept switching from 2G to 3G to LTE, which is great. but if i would've known that info earlier i could have checked if my IMEI disappeared while my radio still wasn't working, i assume it probably did.
after searching around more i found this thread that talks about it and how to prevent it:
http://forum.xda-developers.com/showthread.php?t=1857054
thanks for the help g0at1, hopefully this helps out the OP if he hasn't already fixed the problem, or anyone else that comes across this.

nope
I've flashed back stock numerous times even flashed other versions such as e988 and back again if u dint know how to do that just change your build number in your build prop file...I've tried everything I am downt to antenna cable SIM reader or cell radio.. If radio I might as well just give up cause I can't find one for sell anywhere...I'm not so pressed as I'm using the LG g2 and it's so fast stable and a bit slimmer I think I'm gonna keep it but I would like to fix it and sell it though...... My symptoms are mentioned and all tried fixes are there. Imei is read carrier is not WiFi is received but there is an X above the data bars phone is fully unlocked as well

This may help also but it does not read my imei when the SIM is not in hmm maybe I will rework the imei code and get back if that works. I will keep updated when fixed and with solution