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] No 3g after installing an AOKP/CM9 theme

I was checking out some of the themes that i had downloaded to see which one i liked the most and after a few installs i noticed that my phone was no longer getting 3g/hspa+ ? I had done nothing except install and reboot like instructed in the discription. I was installing them via "Themes" settings. Im currently on AOKP build 39 with the latest nightly from Franco (R191), I have never seen this before which is why i thought id post this thread. I have tried the following and got no fix:
tried *#*#4636#*#* and selected radio band/automatic but got nothing.
tried a refresh on the APN and got nothing
tried Mobile networks/Network operators/both "Select Automatically" and choosing T-mobile and no 3g still =(. Im stuck on EDGE:2
The radio that i have been on for a while now is xxkk6 which has worked pretty good for me coming from Phoenix,AZ
Dont know what else to do, someone help please

Why make two threads for the same problem?
Sent from my Galaxy Nexus using Tapatalk 2

Before creating a "theme broke 3g" thread. Did you happen to call your carrier and see if there has been an outage reported in your area? Have you tried to reflash rom, gapps and kernel and does the problem persist?
good day.

theking_13 said:
Why make two threads for the same problem?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
It was not done intentionally
Sent from my Nexus S using xda premium

I'm having the same problem. Was working fine on HSPA last night and woke up to Edge only all day. It's not a network outage and it's not my account as my SIM works on HSPA on my backup HTC Amaze. I was recently on CM9 Nightly 6/20 but I'll try going back to the stock rom and see what that does.
Edit: Tried reverting to complete stock everything and I'm still stuck on Edge only. I'll try a friend's SIM out and make sure it's not my account/IMEI issue, otherwise something has to be wrong with the phone, but I don't know what

chopper the dog said:
Before creating a "theme broke 3g" thread. Did you happen to call your carrier and see if there has been an outage reported in your area? Have you tried to reflash rom, gapps and kernel and does the problem persist?
good day.
Click to expand...
Click to collapse
There is no outage in my area because everyone that i know has T-mobile and there phone works fine. Re flash rom, gapps, kernel and problem still remains

Either me bringing it back to stock/oem lock then unlock or my phone fixed itself. At first when i was done bringing it back to stock, it was still saying i was on edge, then after about an hour when i tried to root my phone i noticed that 3g/h back up. I still dont know what exactly the root cause but whatever its fixed

Data "stalling"

I don't really know to describe this problem better. I'm running CM10 (lately AOKP's latest build) with default kernels. I've flashed all the radios and tried a bunch of them in solid LTE coverage, I seem to have the same problem every time, which is the data seems to "stall."
It will show full signal, and then if i click a link, it will sort of just sit there, not really doing anything. Eventually it may load, or i give up in patience. Any one have any ideas?

eallan said:
I don't really know to describe this problem better. I'm running CM10 (lately AOKP's latest build) with default kernels. I've flashed all the radios and tried a bunch of them in solid LTE coverage, I seem to have the same problem every time, which is the data seems to "stall."
It will show full signal, and then if i click a link, it will sort of just sit there, not really doing anything. Eventually it may load, or i give up in patience. Any one have any ideas?
Click to expand...
Click to collapse
I am using at&t stock rom and not yet rooted. Even I have the same problem. Tried to disable and enable data from the notification but did not help. But, when I turn on the wifi, and turn off the wifi again, it works fine. When wifi is turned on phone disables the data and try's to connect to wifi or shows the available networks, but I don't connect and I turn off the wifi, phone reconnects to the at&t data again and then it works fine. Not sure why.

kk0813 said:
I am using at&t stock rom and not yet rooted. Even I have the same problem. Tried to disable and enable data from the notification but did not help. But, when I turn on the wifi, and turn off the wifi again, it works fine. When wifi is turned on phone disables the data and try's to connect to wifi or shows the available networks, but I don't connect and I turn off the wifi, phone reconnects to the at&t data again and then it works fine. Not sure why.
Click to expand...
Click to collapse
I can't even run a speed test because it just sits there. Web pages "load" but wind up stalling. Sometimes they finish, sometimes they don't. I have no idea what's causing it. What modem are you on?

eallan said:
I can't even run a speed test because it just sits there. Web pages "load" but wind up stalling. Sometimes they finish, sometimes they don't. I have no idea what's causing it. What modem are you on?
Click to expand...
Click to collapse
May be a good time to contact your cell phone provider for a replacement.

I was on a cross country road trip running CM9 on my GS3 and I kept running into the same thing. A temporary fix was to reboot the phone. Since I got back, I flashed SlimBean and I haven't seen the issue again.
In my case, I think its the SIM card. I used Google Maps/Navagation on my HTC G2 (using a micro SIM adapter) and my phone got HOT, I mean burn your fingers hot (upwards of 57 degC to 60 degC).
If it happens again I'm going to bring my SIM card back to ATT and have them replace it. I did some googleing and it seems like this is common with the Verizon variants of the GS3.

fortesquieu said:
May be a good time to contact your cell phone provider for a replacement.
Click to expand...
Click to collapse
That's the next step... it means reflashing, and waiting for samsung to fix it though, which sucks a lot.

ive had this same problem and it would piss me off! i found out that busybox was the culprit. i uninstalled busybox and cleard my cache in recovery and all was well once again. if any of yall have busybox installed you may look into my solution.

I recently been having this issue also. But mine is a little bit different. Like my phone will say I am connected to "H" for data but when I load a Page it slightly lags switches to H+ and boom Internet works. When I stall for more then 5 minutes it switches back. I'm not sure if it's some battery conserving feature or what but I have no problem against at.
Transmitted from my GALAXYSIII running Jelly Bean. XDA premium

"loosing" 3G on 4.3 Toro

So i was wondering if anyone else is having this issue.
for reference, I am on VZW, with the 4.1.1 radios (as the updated 4.2 radios had me locked into 3G no matter what, at work)
and i ALWAYS do a complete wipe (data/cache/dalvik/system) between ROM flashes.
4.3 bootloader as well.
anyway, this has been an issue since 4.3 hit my device...anything from pure AOSP to CM builds.
when I am on 3G, the bars will go gray and i cannot pull down data at all. (and yes i know the difference between blue and gray bars, I'm saying ANYTHING will say "network not available" not just google apps)
toggling data on/off fixes the problem. I ususally run into this problem 2-3 times a day and it is ALWAYS on 3G.
its not a huge deal, just more annoying than anything else. just wondering if I am alone here. going to be giving the 4.2.2 radios another chance and see if that fixes things.

Having this exact issue...it's driving me nuts as well. At this point I believe I've tried every radio with no luck. Going to try jumping back to 4.2 soon to see if it solves the issue.

Me too
+1
I love how much fast my GNex is on 4.3, but I don't think I can deal with this data bull**** much longer. Frankly, I'm really getting tired of getting a new version of Android, being happy at first, then finding the HUGE bug that makes my phone a horror to use. WHY HAVE YOU FORSAKEN THINE VZW GNEX, GOOGLE!?!?

Just an update, as I updated my radios right around the time I updated to 4.3. I just switched back to CM 10.1 and all my data connection issues went away. That means it definitely has to do with 4.3 builds and not the radio firmware.

ericbarch said:
Just an update, as I updated my radios right around the time I updated to 4.3. I just switched back to CM 10.1 and all my data connection issues went away. That means it definitely has to do with 4.3 builds and not the radio firmware.
Click to expand...
Click to collapse
That's right, 4.3 sucks.
Sent from my Galaxy Nexus using Tapatalk 4

Edit build.prop and include this line:
ro.telephony.default_cdma_sub=0
Data issues are being reported on nearly every rom for the gnex. My data reconnect /switch went from about 60 - 90 secs to a reasonable 5-10. (don't forget to reboot to apply changes)
Sent from my Galaxy Nexus using xda app-developers app

So happy I found this thread!
I'm having the SAME issue: GSM i9250 on Straight talk ATT sim (apn setting are updated and correct). Stock not rooted; been happening since 4.3 Update. From what I've read even folks on the N4 are having similar issues.
I've factory reset 3-4 times for testing purposes (back to "normal" for about an hour then those pesky gray bars and NO data on 3G/4G).
I have to do the airplane mode toggle every 1/2 hour if I'm really using the internet. Big pain in the ass!
I always rooted my devices in the past and haven't done the GNEX because I always felt stock was smooth enough for my purposes (quasi-work-phone and I need stability). If I have to deal with this bull-sh&% I'm probably gonna have to root and install a 4.2 ROM.
Any-whoo...thanks for letting me rant :^)
Hopefully "kit-kat" will help?

same issue its very annoying... did anyone find the fix ??

ffejy462 said:
Edit build.prop and include this line:
ro.telephony.default_cdma_sub=0
Data issues are being reported on nearly every rom for the gnex. My data reconnect /switch went from about 60 - 90 secs to a reasonable 5-10. (don't forget to reboot to apply changes)
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Is this a fix?
My issue seems to be on 4g as well. If the phone switches from wifi to 4g or if it goes from 4g to 3g and back to 4g it shows a connection with bars but never connects to data again.

Issue with Madhi-ROM 4.4.2 and data

Hello,
I have flashed Madhi-ROM 4.4.2 yesterday night and it had LTE working properly. Today, I ran into an issue where it would no longer connect to data at all. I have reflashed the stock rom and updated profile and prl then reflashed Madhi-rom 4.4.2 and at the screen "Activate mobile data service", it just keeps running and occasionally make a call to activate mobile data which ends up failing. I don't know if this is a common issue, but I'd like my mobile data to work. Other than this issue, I think its a very nice rom. Any help would be greatly appreciated.

staro0989 said:
Hello,
I have flashed Madhi-ROM 4.4.2 yesterday night and it had LTE working properly. Today, I ran into an issue where it would no longer connect to data at all. I have reflashed the stock rom and updated profile and prl then reflashed Madhi-rom 4.4.2 and at the screen "Activate mobile data service", it just keeps running and occasionally make a call to activate mobile data which ends up failing. I don't know if this is a common issue, but I'd like my mobile data to work. Other than this issue, I think its a very nice rom. Any help would be greatly appreciated.
Click to expand...
Click to collapse
Have you requested help in the appropriate thread?
Any issues that I have had is best directed to the appropriate thread.

mesacarvin said:
Have you requested help in the appropriate thread?
Any issues that I have had is best directed to the appropriate thread.
Click to expand...
Click to collapse
I would love too, but I don't have my required 10 posts.

staro0989 said:
I would love too, but I don't have my required 10 posts.
Click to expand...
Click to collapse
oh okay
Seems like some people have been having 4G connection issues not only with Mahdi but other Roms as well.
Here are some of the suggestions:
Toggle Airplane mode for 10 seconds then turn off
Dirty flash ROM again
Return to stock and update PRL then reflash custom ROM
Keep data connection at 3G and live with it
You can also try flashing and comparing the Gee version vs. the ls970 version
It's hit or miss with this phone. No rhyme or reason for no consistency for such a basic requirement
I'm sure more experienced members will offer more suggestions
Hope this helps

Yeah, LTE is extremely sketchy on AOSP ROMs, Gee or LS970. Since the connection is just so inconsistent, I've found that the best thing to do is, as listed above, toggle airplane mode on/off, reflashing, or just sticking with 3G. 4G works flawlessly on stock LG ROMs though.
Sent from my LG-gee using Tapatalk

mesacarvin said:
oh okay
Seems like some people have been having 4G connection issues not only with Mahdi but other Roms as well.
Here are some of the suggestions:
Toggle Airplane mode for 10 seconds then turn off
Dirty flash ROM again
Return to stock and update PRL then reflash custom ROM
Keep data connection at 3G and live with it
You can also try flashing and comparing the Gee version vs. the ls970 version
It's hit or miss with this phone. No rhyme or reason for no consistency for such a basic requirement
I'm sure more experienced members will offer more suggestions
Hope this helps
Click to expand...
Click to collapse
iamterence said:
Yeah, LTE is extremely sketchy on AOSP ROMs, Gee or LS970. Since the connection is just so inconsistent, I've found that the best thing to do is, as listed above, toggle airplane mode on/off, reflashing, or just sticking with 3G. 4G works flawlessly on stock LG ROMs though.
Sent from my LG-gee using Tapatalk
Click to expand...
Click to collapse
Thank you guys for the help. I tried all the fixes above with no luck. I have reverted back to the stock rom since I rather have my mobile data working than run an AOSP rom.

staro0989 said:
Thank you guys for the help. I tried all the fixes above with no luck. I have reverted back to the stock rom since I rather have my mobile data working than run an AOSP rom.
Click to expand...
Click to collapse
I believe I've struck gold with the latest Dirty Unicorn ROM!
Everything works: 4G, GPS, yes and even google calendar.
At first, I could only get 3G then one of options was just to simply display 4G instead of LTE in status bar then viola, 4G!
Probably just coincidence but I am one happy dude!
Might want to give DU a try

mesacarvin said:
I believe I've struck gold with the latest Dirty Unicorn ROM!
Everything works: 4G, GPS, yes and even google calendar.
At first, I could only get 3G then one of options was just to simply display 4G instead of LTE in status bar then viola, 4G!
Probably just coincidence but I am one happy dude!
Might want to give DU a try
Click to expand...
Click to collapse
I may give it a try sometime later. My phone works perfectly with the stock rom at the moment.

staro0989 said:
Thank you guys for the help. I tried all the fixes above with no luck. I have reverted back to the stock rom since I rather have my mobile data working than run an AOSP rom.
Click to expand...
Click to collapse
Have you tried SuperNexus? Honestly heard nothing but good things about this rom as long as the installation instructions are followed exactly. LTE, GPS, Bluetooth, and battery life are all working from what i've heard, you might wanna give it a try.
http://forum.xda-developers.com/showthread.php?t=2370804

grivera1296 said:
Have you tried SuperNexus? Honestly heard nothing but good things about this rom as long as the installation instructions are followed exactly. LTE, GPS, Bluetooth, and battery life are all working from what i've heard, you might wanna give it a try.
http://forum.xda-developers.com/showthread.php?t=2370804
Click to expand...
Click to collapse
I will definitely give this one a try.