Develop Bugs

GSM - GNEX Signal Drop Solution - Working ROM,Radio,Kernel combos. POST HERE...

***EDIT*** I believe that I have found the solution to this issue (at least for me) by flashing the FuGuMod Kernel as advised to do by 2 users (jetrii and slyydrr) who advised me of this in the following thread here http://forum.xda-developers.com/showthread.php?t=1487056 on pages 7 and 8 respectively.
This fix may NOT work for you but I can say that it has worked for me. Please see post #33 (and onward) in this thread.
I have painstakingly been trying to find a solution to this issue and it SEEMS as if I have FINALLY found one so if I have helped you in any way then I ask that you please press the "Thanks" button and please visit the thread above and say thanks to jetrii and slyydrr as well. I also recommend that if this works for you that you go to the FuGuMod thread here http://forum.xda-developers.com/showthread.php?t=1438417 and pay tribute to nikademus for his kernel!!! I know I sure have... Also... Make SURE that you flash the correct kernel version for your ROM ie: 4.0.3 ROM = 4.0.3 Kernel, etc...
Thanks...
Hi everyone,
I have decided to start a fresh thread here as I have seen (and replied to) many threads regarding people with the GSM version of the GNEX (like I have) that are suffering from random signal loss of both data and GSM services for apparently NO REASON.
If you are also experiencing these issues I ask that you please post them here so that they are easy to follow and I also ask for anyone with ANY answsers to please post them here as well. Also... Please post what firmware you are running and any steps you have tried to fix this issue be them a failure or a success. I have done the following...
I am currently on the FoxHound v1.0 AOSP 4.0.3 firmware and experience these random signal drops. I have flashed NUMEROUS radios / modems to try and fix this with no success. I had been told by someone that the issue MAY be a BUG in the 4.0.3 AOSP ROMS but I have a hard time believing this as some people do NOT experience these same issues while on 4.0.3 ROMS.
What did work was to flash to the Android Revolution 4.0.2 ROM and on this I do NOT experience these random drops which COULD mean that the problem DOES lie in the AOSP builds of 4.0.3 but again... I have a difficult time believing this but it could be true. Also... Stock firmware (4.0.1) for me here in Canada does not experience these random signal losses either.
This is very annoying as I want to run the 4.0.3 custom ROMS for their customization capabilities, etc but I cannot keep my device in a USABLE state when on 4.0.3 so I have to go back to my trusty SGSII.
Again, please post here to voice your concerns and opinions on this and perhaps SOMEONE will be able to find us a solution.
Thanks,

are you using your carrier supplied radio?

s2d4 said:
are you using your carrier supplied radio?
Click to expand...
Click to collapse
Yup. Im on UGKL1 which is the radio that shipped on my device. I have also tried other radios (XXKL1, UGKK7, XXKG6, etc) as I mentioned as well and I still experience the same issue and others have mentioned the same things as well with no successes.

There was this one time that I had lost signal randomly (while on stock unmodified out of the box ICS) but I was able to get it back with a factory reset. After that it never happened to me again.

jonnyg1097 said:
There was this one time that I had lost signal randomly (while on stock unmodified out of the box ICS) but I was able to get it back with a factory reset. After that it never happened to me again.
Click to expand...
Click to collapse
Thanks for the comment. May I ask what Radio your device has on it? Are you running any sort of custom ROM now? If so, what are you running?

Right now the radio is KK6 (im on stock yakju 4.0.2 now) but at the time it was what came with the phone (shipped from Rogers)

jonnyg1097 said:
Right now the radio is KK6 (im on stock yakju 4.0.2 now) but at the time it was what came with the phone (shipped from Rogers)
Click to expand...
Click to collapse
Hmmmm... Interesting... You got an OTA update to 4.0.2? I have seen other posts that people here in Canada are complaining that they have not received ANY OTA updates at all... When did you get this?
Since I have been on a custom ROM I have not seen this update obviously...

I'm on GSM with Rogers as well. I haven't noticed any significant signal drops with the exception of my basement (no cell phones get signal there - its a fortress lol). I am on 4.0.3 as well. I have read that the 4.0.4 has improved radio... so it may be worth looking into. I saw a WIP 4.0.4 GSM Rom here.

I've been experiencing this as well. I'll have a great signal, then suddenly it totally disappears, and after a few seconds the signal comes back. It's even happened during voice calls as well. I experienced this on the stock device (4.0.1). I'm now using the GummyNex rom on 4.0.3 (w/ a stock radio), and I'm still experiencing these random signal loses. (T-mobile USA in NYC, btw).
It's not a constant problem, but it happens a few times a day. enough to be an mild annoyance.

grantith said:
I've been experiencing this as well. I'll have a great signal, then suddenly it totally disappears, and after a few seconds the signal comes back. It's even happened during voice calls as well. I experienced this on the stock device (4.0.1). I'm now using the GummyNex rom on 4.0.3 (w/ a stock radio), and I'm still experiencing these random signal loses. (T-mobile USA in NYC, btw).
It's not a constant problem, but it happens a few times a day. enough to be an mild annoyance.
Click to expand...
Click to collapse
Hmmmmm... I ONLY seem to get these signal drops on 4.0.3... Weird... You have a GSM device right? Not CDMA - LTE?

I found something new to try when I get home but if anyone may want to try it now and post your results it would be very helpful and appreciated.
This is a radio from the Japanese variant of the GNEX and most people who have tried it have had good success with it... See the link below...
http://forum.xda-developers.com/showthread.php?t=1478685

I THINK I am experiencing this. My phone keeps going from H+ to 3G non stop at the top. How can you tell if your signal is being dropped? (sorry new to this) I've seen posts with a network screen? showing connection but I can't seem to find this.

Haven't had any issues as far as that. There were times when I was using the browser and it said network error but everything still worked.
Sent from my Galaxy Nexus using XDA Premium App

mattymac said:
I THINK I am experiencing this. My phone keeps going from H+ to 3G non stop at the top. How can you tell if your signal is being dropped? (sorry new to this) I've seen posts with a network screen? showing connection but I can't seem to find this.
Click to expand...
Click to collapse
You will notice because the signal bars icon will go "completely blank" and for example... If you are on your lockscreen and you can see the name of your provider...It will disappear completely for a couple of seconds and then come back...

No I guess I am not experiencing this. I'm not exactly sure what the difference between H+ and 3G is but my phone seems to stay in 3G until it transfers data, when its transferring data, it goes into H+, then back into 3G. Maybe this is normal. I was just curious because I did flash Yakju and the radios when i bought it.

mattymac said:
No I guess I am not experiencing this. I'm not exactly sure what the difference between H+ and 3G is but my phone seems to stay in 3G until it transfers data, when its transferring data, it goes into H+, then back into 3G. Maybe this is normal. I was just curious because I did flash Yakju and the radios when i bought it.
Click to expand...
Click to collapse
Yes... That is normal...

yiannisthegreek said:
Hmmmm... Interesting... You got an OTA update to 4.0.2? I have seen other posts that people here in Canada are complaining that they have not received ANY OTA updates at all... When did you get this?
Since I have been on a custom ROM I have not seen this update obviously...
Click to expand...
Click to collapse
Well, when I first flashed 4.0.1 yakju I got notifications of being able to upgrade it OTA. However, at the time I must of messed something up when I flashed it because the updates werent successful when I went to update it. So I got fed up with it and I flashed 4.0.2 manually via fastboot.

yiannisthegreek said:
I found something new to try when I get home but if anyone may want to try it now and post your results it would be very helpful and appreciated.
This is a radio from the Japanese variant of the GNEX and most people who have tried it have had good success with it... See the link below...
http://forum.xda-developers.com/showthread.php?t=1478685
Click to expand...
Click to collapse
So I flashed this radio and I get SOMEWHAT better stability but it only accesses the EDGE network and NO 3G/H... Guess this is a no go too...

HD Rom, Latest build.
Radio - XXKK6
Had the stock radio with the HD Rom, and thought that my random lost connections on market were due to my not flashing the recommended radio. Flashed the recommended radio (current), and still experienced them. Signal is better, and oddly enough voice doesn't get lost. Phone doesn't show that there is no signal, in fact it is at 3 bars on H.
Edit: I use a regional carrier, that doesn't list APN settings. By leaving APN type blank, I seemed to have solved the problem. Also dramatically increased the signal strength (Using Network Signal app).

finch8423 said:
HD Rom, Latest build.
Radio - XXKK6
Had the stock radio with the HD Rom, and thought that my random lost connections on market were due to my not flashing the recommended radio. Flashed the recommended radio (current), and still experienced them. Signal is better, and oddly enough voice doesn't get lost. Phone doesn't show that there is no signal, in fact it is at 3 bars on H.
Edit: I use a regional carrier, that doesn't list APN settings. By leaving APN type blank, I seemed to have solved the problem. Also dramatically increased the signal strength (Using Network Signal app).
Click to expand...
Click to collapse
What is the name of this network signal app? Developers name and what does it do exactly?

[Q] Complete Connection Drops w/ Full Signal

Ok, this is driving me nuts. Maybe someone has some additional ideas on what I could try out.
First of all, I am on Verizon in the SE Michigan area. At work I hover around 2-3bars 4G/full bars 3G. The same thing at my home. I am rooted and w/ 4.0.4.
I have tried the 4.0.4 radios, the hybrid 2 and hybrid 3 radios. For all of them I get similar behavior.
I would say almost half of the time when I request data (try to open a website, etc...) or if I try to place a call I get a total connection drop even though a stable connection (either 3g or 4g) is indicated. Call won't complete and/or data won't work - no bars and a little gray x. This is when I have a completely fine connection, it just seems to crap out when I request either data or a call. After about 30 seconds or so the connections automatically resets itself and it appears to be fine. Occasionally i need to restart my phone.
I've been getting this with 4.0.3 non rooted and 4.0.4 rooted with all the above radios. it's a massive pain in the ass. I had no such issues with my DInc and my gf has no such issues with her Razr.
Any ideas?

I would say you have bad signal, despite what your signal bars may show. No amount of data drops will stop a call from being completed unless it is a complete loss of signal.
The other possibility is something is causing the ril to crash. However without you supplying a logcat, there is no way to be sure.

So, do you think this may be a hardware problem? I am getting "no connection" when I try to make calls in areas where no one else appears to be having issues. Do I need to throw my phone against a wall and use my insurance for a new one?
Ok, ill run logcat and post when it happens again.

Sorry for borrowing your thread, but I also seem to face signal drops and don't know if it's because of carrier breakdowns or something else. I have the XXLA2 radio and run the latest AOKP.
My logcat is attached, if anyone wants to help me.

Theshawty said:
Sorry for borrowing your thread, but I also seem to face signal drops and don't know if it's because of carrier breakdowns or something else. I have the XXLA2 radio and run the latest AOKP.
My logcat is attached, if anyone wants to help me.
Click to expand...
Click to collapse
It wont be related, because this poster is on Verizon.

I believe I found my issue...i'm certainly not the only one...
Issue 24345 "Samsung Galaxy Nexus (CDMA/LTE) radio drops all data and voice"
(I cant post links yet)

mrthemike said:
I believe I found my issue...i'm certainly not the only one...
Issue 24345 "Samsung Galaxy Nexus (CDMA/LTE) radio drops all data and voice"
(I cant post links yet)
Click to expand...
Click to collapse
Does it happen to you on 4.0.2? You only mentioned 4.0.3 and 4.0.4 (the report is for 4.0.2).

adrynalyne said:
It wont be related, because this poster is on Verizon.
Click to expand...
Click to collapse
Ah, alrighty then.

Theshawty said:
Ah, alrighty then.
Click to expand...
Click to collapse
If you are on 4.0.4, it is a known issue for GSM users.

adrynalyne said:
Does it happen to you on 4.0.2? You only mentioned 4.0.3 and 4.0.4 (the report is for 4.0.2).
Click to expand...
Click to collapse
I haven't tried 4.0.2. I could try that, but i'm confident it will happen with those as well. The symptoms described in that report mirror exactly what happens with mine.
I did three speedtests with my phone, on the third one I lost data and voice. Tried to make a call and got a "Mobile network not available". Almost like something is completely crashing voice/data.

adrynalyne said:
If you are on 4.0.4, it is a known issue for GSM users.
Click to expand...
Click to collapse
A closer inspection has led me to believe that I do not have this error on the ROM I use, so I'm sorry for possibly wasting your time.

Thanks for the RIL crash suggestion adrynalyne, I requested a replacement phone as it appears that is the only fix.

OTA 4.0.4 (new) IMM76I - improves on signal loss issue, not solve it

Previously on the older 4.0.4 I lost the GSM signal AND could not recover signal every day after my phone went to deep sleep.
Since I updated, this morning is the ONLY day so far that I lost signal and did not recover signal.
Looks like this fix is not perfect but it helps.

You needed to create a new topic for this?
Sent from my Galaxy Nexus using XDA

I saw the same thing on my Nexus
So went back to setcpu setting the min speed of 700. Works like a charm

Drift spunk said:
You needed to create a new topic for this?
Sent from my Galaxy Nexus using XDA
Click to expand...
Click to collapse
arguably yes, isn't it the most important thing this update is supposed to address? There's no bug thread on 4.0.4 IMM76I. pray tell what you would have done.

There is another one: http://forum.xda-developers.com/showthread.php?t=1614575
I think you should extend this thread title with "for me". Because who had the "real" signal drop during sleep issue, the new OTA fixed it for them. Probably you have another issue, what is look-a-like the signal issue, but it is not that.
Sent from my Galaxy Nexus using xda premium

I never experienced the issue, but I love how everybody is assuming that this new build fixes this notorious issue. I have yet to see a change log or any kind of information from Google that explains what was done in this release other than "a few kernel tweaks." People's posts on XDA quickly turn into accepted facts of information without any kind of verification.

Fixed it for me. What do you think it was?
sent with 3g courage. better recognize. 4g courage coming soon. stock up on diapers.

I have no idea, but shouldn't these things be logged somewhere? It would be nice if Google issued some release notes with their releases so people can stop speculating whether a certain bug was fixed or not.

Some people don't feel there is a need to do a factory default after every update, I on the other hand disagree.
When I changed over to Yakju, I did a factory default and wiped everything. I never had a signal drop issue at all.
However when I got the new small update via OTA, I decided to let it run for a bit without the factory default.... As such, I experienced one drop as noted on Signal Alert.
Immediately I did a factory default and wiped everything again. Haven't had one signal drop since...
So not saying there never was a problem to begin with, but it does seem that factory defaulting after every update causes things to run a lot more smooth, permanently. At least for me.

Agreed. I always do a reset then restore particular apps with titbu. No software issues so far.

greeced said:
Some people don't feel there is a need to do a factory default after every update, I on the other hand disagree.
When I changed over to Yakju, I did a factory default and wiped everything. I never had a signal drop issue at all.
However when I got the new small update via OTA, I decided to let it run for a bit without the factory default.... As such, I experienced one drop as noted on Signal Alert.
Immediately I did a factory default and wiped everything again. Haven't had one signal drop since...
So not saying there never was a problem to begin with, but it does seem that factory defaulting after every update causes things to run a lot more smooth, permanently. At least for me.
Click to expand...
Click to collapse
Will try this when I get home today. It's really irritating me how my signal just drops and I have to do a "Airplane Mode On/Off" to reacquire signal.
It actually got worse since I updated to IMM76I.

greeced said:
Some people don't feel there is a need to do a factory default after every update, I on the other hand disagree.
When I changed over to Yakju, I did a factory default and wiped everything. I never had a signal drop issue at all.
However when I got the new small update via OTA, I decided to let it run for a bit without the factory default.... As such, I experienced one drop as noted on Signal Alert.
Immediately I did a factory default and wiped everything again. Haven't had one signal drop since...
So not saying there never was a problem to begin with, but it does seem that factory defaulting after every update causes things to run a lot more smooth, permanently. At least for me.
Click to expand...
Click to collapse
A slightly sloppy whenever you install an update you have to do wipe the phone .. It should not be so

@rbiter said:
Fixed it for me. What do you think it was?
sent with 3g courage. better recognize. 4g courage coming soon. stock up on diapers.
Click to expand...
Click to collapse
IMM76I was just a kernel. The kernel reverts the radio and voltage changes.
If folks really believe that IMM76I was not a fix, they could easily run an old 4.0.3 kernel. If it fixes it, then the problem is IMM76I, if it does not, then they are pointing their finger in the wrong direction.
Here is a 4.0.3 image I found. Fastboot it.
Code:
adb reboot bootloader
fastboot boot boot.img

Drop data issue on Galaxy Nexus

some people say drop data problem on Galaxy Nexus, it is related to radio/baseband issue, a lot of people recommend the following components
Radio/Baseband：
cwm-radio-i9250-xxla2 (latest radio from Google)
Kernel：
franco.Kernel-r158 (best kernel on market)
ROM：
aokp_maguro_build-35 (latest aokp rom)

Just go back to 4.0.2
Sent from my Galaxy Nexus using XDA

I have the above combination and it's worse. The radios in my device are going nuts.

How can it be so bad?
I'm like going crazy!!!
Its the worst phone ever !!!!!!!!!!
Sent from my Galaxy Nexus using XDA

Was at the Verizon store today and there floor model had no drop issues. Tried mine right next to it and it started to randomly drop. They are sending me a new one and are saying it will be here tomorrow hopefully I don't have the issue after the new one. The tech has a nexus and said he has no issues with his.
Sent from my Galaxy Nexus using Tapatalk 2

i had the same problem, it would drop data even though it showed i had strong signal until i set the min cpu to 700mhz. after i did that i never had any data drop problems
hope that helps

Came here to ask about this. Was wondering why it keeps happening. Was working fine when I was on stock 4.0.4 but since flashing aokp it happens all the time.
Sent from my Galaxy Nexus using XDA

I had these issues with aokp and Franco kernel m3. Switched to revolution hd and James Bond kernel. Haven't had a single drop since.
Skickat från min Galaxy Nexus via Tapatalk 2

I'm completely stock IMM76I, rooted and I sometimes get data drops.. this happens more frequently when I haven't rebooted my phone for several days. Sometimes the signal letter (H) disappears completely until I turn airplane mode on/off. Other times I see H but there is no data, only a reboot fixes it.
I'm using Tasker to auto-reboot the phone every day at 5AM, but this is gettig really annoying. I wasn't having any issues prior to that IMM76I OTA.

edwin124 said:
i had the same problem, it would drop data even though it showed i had strong signal until i set the min cpu to 700mhz. after i did that i never had any data drop problems
hope that helps
Click to expand...
Click to collapse
Noticed this was happening only when I was commuting on the highway, my phone loses data connectivity (albeit still showing 'H') and never gets it back until I reboot.
I'll try the set 700MHZ method and report back. But will increasing the min CPU from 350 to 700 hurt battery life a lot?

gabster21 said:
I'm completely stock IMM76I, rooted and I sometimes get data drops.. this happens more frequently when I haven't rebooted my phone for several days. Sometimes the signal letter (H) disappears completely until I turn airplane mode on/off. Other times I see H but there is no data, only a reboot fixes it.
I'm using Tasker to auto-reboot the phone every day at 5AM, but this is gettig really annoying. I wasn't having any issues prior to that IMM76I OTA.
Click to expand...
Click to collapse
I get this a lot, it's really annoying.
I'm really hopping they fix this in the next update, it totally ruins the experience of using the phone. You don't know what you'll get half the time.

gabster21 said:
Noticed this was happening only when I was commuting on the highway, my phone loses data connectivity (albeit still showing 'H') and never gets it back until I reboot.
I'll try the set 700MHZ method and report back. But will increasing the min CPU from 350 to 700 hurt battery life a lot?
Click to expand...
Click to collapse
Based on my exp, you don't lose much battery life. I accidentally left the CPU at minimum 691 MHz and got similar battery life with 307 MHz as my minimum.
Sent from my Galaxy Nexus using Tapatalk 2

If you don't have PRIMELA03* bootloader and I9250XXLA02 radio on ICS 4.0.4 you are going to have these issues. Google even said so!!! ref. http://source.android.com/source/building-devices.html dont blame google or samsung this phone is rock solid when used properly
fyi AOKP is notoriously buggy, every release is

blowtorch said:
If you don't have PRIMEKL03 bootloader and I9250XXLA02 radio on ICS 4.0.4 you are going to have these issues. Google even said so!!! ref. http://source.android.com/source/building-devices.html dont blame google or samsung this phone is rock solid when used properly
fyi AOKP is notoriously buggy, every release is
Click to expand...
Click to collapse
I just noticed I'm on the 4.0.1 bootloader. I'll flash the 4.0.4 one when I get home to see if I can finally get rid of this issue.
I tried flashing radios and RILs and it really hasn't helped...

I had similar issues though mine were mostly when leaving a wifi area my phone would not grab my cell data until I toggled airplane mode on then back off. Later I found out about GetRIL and discovered that most ROMs (due to being based on 4.0.4) have the XXLA02 RIL (Radio Interface Layer) while I was running the UGLC1 radio. GetRIL checks for you and allows you to flash the proper RIL (if rooted with busybox). I flashed the matching UGLC1 RIL and havent had a drop since

blowtorch said:
If you don't have PRIMEKL03 bootloader and I9250XXLA02 radio on ICS 4.0.4 you are going to have these issues. Google even said so!!! ref. http://source.android.com/source/building-devices.html dont blame google or samsung this phone is rock solid when used properly
fyi AOKP is notoriously buggy, every release is
Click to expand...
Click to collapse
u say always the same response to everywhere...but its wrong (PRIMEKL03 doesn't exists..did u noticed?)
the suggested bootloader is the PRIMELA03..that page have just a typo (i asked to jbq and he confirmed the typo, he will update in future that page)
and EVERYONE have the correct PRIMELA03 bootloader
the signal issue is related to some bugs in the 4.0.4 roms
it happens randomly for some people in some network conditions..is like the phone is not able to get the data network...no way to solve this until a next update from google
the people that said "i solved by changing radio/rom/etc", just didnt test long enough to get the same problem again
if u (and of course lot of other people) don't have any network problem, then u are lucky living in a place where the network and ur operator are perfect...end of story
i'm not pessimistic, this phone is perfect, but will be really perfect when they will fix this...i had other android phones before this, and none had this problems...i know everything about radios, apn, networks..but there is nothing i can do to make it working fine ALWAYS..sometimes the mobile network works, sometime there is no way, even after a reboot, only moving temporarly to a different area solve the problem sometimes, even if signal was full bar

andQlimax said:
the people that said "i solved by changing radio/rom/etc", just didnt test long enough to get the same problem again
Click to expand...
Click to collapse
As per my previous post I didnt change my Radio but rather matched my Radio to my RIL (Radio Interface Layer). My phone hasnt dropped data in the longest time since I've owned it and shows no signs of ever dropping it (unless of course I lose signal ).

WoodroweBones said:
As per my previous post I didnt change my Radio but rather matched my Radio to my RIL (Radio Interface Layer). My phone hasnt dropped data in the longest time since I've owned it and shows no signs of ever dropping it (unless of course I lose signal ).
Click to expand...
Click to collapse
Ya..wait for it
Inviato dal mio Galaxy Nexus con Tapatalk 2

andQlimax said:
u say always the same response to everywhere...but its wrong (PRIMEKL03 doesn't exists..did u noticed?)
the suggested bootloader is the PRIMELA03..that page have just a typo (i asked to jbq and he confirmed the typo, he will update in future that page)
and EVERYONE have the correct PRIMELA03 bootloader
the signal issue is related to some bugs in the 4.0.4 roms
it happens randomly for some people in some network conditions..is like the phone is not able to get the data network...no way to solve this until a next update from google
the people that said "i solved by changing radio/rom/etc", just didnt test long enough to get the same problem again
if u (and of course lot of other people) don't have any network problem, then u are lucky living in a place where the network and ur operator are perfect...end of story
i'm not pessimistic, this phone is perfect, but will be really perfect when they will fix this...i had other android phones before this, and none had this problems...i know everything about radios, apn, networks..but there is nothing i can do to make it working fine ALWAYS..sometimes the mobile network works, sometime there is no way, even after a reboot, only moving temporarly to a different area solve the problem sometimes, even if signal was full bar
Click to expand...
Click to collapse
This question has been asked way too many times. I say the same response because it helps people solve this problem. The bootloader and radio configuration needs to be correct at least as a starting point and first step in trouble shooting. you assume everyone has the correct bootloader and radio, now that is just presumptuous. I'm so happy that you know "everything" about radios bootloaders and apns that is righteous! your post was very helpful, a great help thanks so much.

andQlimax said:
u say always the same response to everywhere...but its wrong (PRIMEKL03 doesn't exists..did u noticed?)
the suggested bootloader is the PRIMELA03..that page have just a typo (i asked to jbq and he confirmed the typo, he will update in future that page)
and EVERYONE have the correct PRIMELA03 bootloader
the signal issue is related to some bugs in the 4.0.4 roms
it happens randomly for some people in some network conditions..is like the phone is not able to get the data network...no way to solve this until a next update from google
the people that said "i solved by changing radio/rom/etc", just didnt test long enough to get the same problem again
if u (and of course lot of other people) don't have any network problem, then u are lucky living in a place where the network and ur operator are perfect...end of story
i'm not pessimistic, this phone is perfect, but will be really perfect when they will fix this...i had other android phones before this, and none had this problems...i know everything about radios, apn, networks..but there is nothing i can do to make it working fine ALWAYS..sometimes the mobile network works, sometime there is no way, even after a reboot, only moving temporarly to a different area solve the problem sometimes, even if signal was full bar
Click to expand...
Click to collapse
This is actually not true. I was on 4.0.4 but had the 4.0.1 bootloader somehow.
I haven't had a single data drop since flashing the new bootloader with XXLA02. The real test will be tomorrow, when I take my phone into work (big metal building). If I get no data drops at all tomorrow, problem fixed.

Gsm Nexus No Service

Hey guys i have a galaxy nexus that is rooted and on cm11 rom baseband is 19250UGLL1 radio this phone always lose reception right now i am at work and my phone says emergency calls only. is there anyway to fix this guys? Thanks

sofia-captivate said:
Hey guys i have a galaxy nexus that is rooted and on cm11 rom baseband is 19250UGLL1 radio this phone always lose reception right now i am at work and my phone says emergency calls only. is there anyway to fix this guys? Thanks
Click to expand...
Click to collapse
I have the same problem, every now and then it will stop having service and the only way to get it back is by rebooting, sometimes it works at first sometimes it needs a couple of reboots.
Any hint with this would be great
(this happened to me with aokp and cyanogenmod)

Willyfrog said:
I have the same problem, every now and then it will stop having service and the only way to get it back is by rebooting, sometimes it works at first sometimes it needs a couple of reboots.
Any hint with this would be great
(this happened to me with aokp and cyanogenmod)
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I have the same problem but it stopped having service at all, and it's not a sim card problem (the same simcard works in another phone)

Check if your IMEI is valid

lkeops said:
Check if your IMEI is valid
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Yes, I have a valid IMEI. Sorry to take so long to answer

lkeops said:
Check if your IMEI is valid
Click to expand...
Click to collapse
same problem and i'm having invalid imei

im having almost identical problems... like a month or 2 ago i reflashed to the new 4.3 slim rom. I have been fighting this thing every since. Ive tried so many different radios but yet i still have this issue, sometimes i can go days without problems but now it seems to loose data even sooner. ONLY way i get data (4G) back is if i reboot. Ive tried disabling then re-enabling data, same for airplane mode, nothing works. I think part of the problem is this damn rom.... i used to be on black bean 8 and for the mobile networks it had an option for "CDMA/LTE". This rom must be a ported rom cause the only selection for mobile networks that work is "CDMA/EvDo/GSM/WCDMA". I am on Sprint CDMA and LTE. i dont understand why this was done like this. I Would like to go back to blackbean 8 but i had problems with it and i like some of the settings for this rom better. Anybody have any ideas? Ive tried ALL the radios, none seem to be stable.
oh and i would post in there for the rom's forum but seeing as i havent posted enough here im not able to ask questions about it or anything :-/