Develop Bugs

Galaxy Nexus loses network connectivity after enabling data

Build: IMM76I
Baseband: I9250XXLA2
If I don't enable data, the phone works fine. I can receive and make calls just fine.
Once I turn on data connectivity, data works fine for a while. Like 40-45 seconds. After that, the connection sort of gets stuck. I cannot make any calls, and if I call my number, I get a 'not reachable' message. The indicator in the notification bar will show full bars for a while, then if I got Settings >> Wireless & Networks >> More >> Network operators to do a manual search for network, the status bars drop to zero, become an 'x', and then go to full again. The behavior then repeats.
Bootloader is unlocked.
Any kind of help will be appreciated.
If it helps, I have the NTT Docomo version of the Galaxy Nexus (SC-04D) that is sold in Japan, but I live (and use the phone) in India.

Are the APN's set up properly for your carrier?
I'm assuming you've tried the usual toggling of airplane mode and rebooting, etc.?

APN is setup correctly, which is why the data connection works fine for a minute or so.
Toggling Airplane mode often does nothing at all, since the cellular connectivity system seems to be stuck, even when it does, it takes a loooong time for Airplane mode to get enabled in the first place, and disabling it takes even longer.
Rebooting the phone fixes the issue, but it returns very quickly (within a minute or so after rebooting).

Also, another similar thread over here mentioned that their problem got solved by flashing the FuguMod kernel - http://forum.xda-developers.com/showthread.php?t=1438417
I flashed the kernel successfully, but the problem still persists.

Mine is doing the same thing. I'm out of ideas.

i'm starting to think this problem is extremely common.
My thread: http://forum.xda-developers.com/showthread.php?t=1626593
another: http://forum.xda-developers.com/showthread.php?t=1643015
another: http://forum.xda-developers.com/showthread.php?t=1618163
and another one: http://forum.xda-developers.com/showthread.php?p=26340507
i believe those thread is about same problem (or variants)...
it will be really useful if everybody was under same thread! =o)

[SOLVED] No reception, though HSDPA work..

Hey guys. Strange thing just happened to my Gnex overnight. I'm currently on a OTA JB Rom. Unlocked and rooted. Stock radio. In the morning I found my phone with 0 bars of GSM signal. Thought it might be my GiffGaff operator who was down just recently. But the situation didn't change during the day. My SIM works perfectly in other phones. Other SIMs I put seem to catch signal briefly (mere second) during OS boot and even get an SMS but then it goes down to hell. What's strange is that the HSDPA works!!! Even though the indicator show 0 bars pages do load and I can use mobile internet. But can't make calls and send texts.. The signal strength shows -109 dB, HSDPA. Seems legit. But damn, what's happening to It?
Currently doing a nandroid backup and will try to either revert to earlier JB or ICS backups or try to flash something for the sake of experiment.. BTW reflashing stock XXLF1 radio didn't change a thing..

Have you checked to make sure that the network settings or on auto, or tried changing the network gettings to GSM(2g) only? Worth a shot ^^

So yeah..Flashing MIUI (4.0.4) didn't help..flashing another (older) radio didn't help as well..I'm out of ideas here..

I've entered the *#*#4636#*#* menu and tried to switch WHSDPA-preferred to GSM only. It didn't actually work. Ech..Flashing back my backup (to make things worse MD sum mismatched and I've lost the most recent backup)

So...I managed to get signal with a roaming SIM card. Though I can't call or text anyway. Even though I have 2-3 bars. Dammit, what can it be?

No phone signal yet can use mobile internet

I've got a strange problem that I cannot solve or find anyone else that has had the same problem.
I recently updated to Minco V4 and since my status bar has been showing no signal and mobile standby shows 100% without signal yet I have mobile data. I cannot make any phone calls but can browse the internet. No amount of rebooting, airplane mode on/off will work. I've also gone back to both stock ICS and JB where the problem still exists.
My network is T-Mobile and it won't let me manually connect to it but the phone will occasionally register when I select automatic although it doesn't correct the fault. Anyone have any ideas what has gone wrong with my phone?
UPDATE: It seems I can only get a phone signal when select 2g T-mobile network only or connecting to T-Mobile orange. If I untick 2g networks and it connects to t-mobile 3g I can't receive or make calls.

Does your Radio and baseband match?

I installed the linked radio from the MiNCO thread after flashing the rom and discovering this issue yet it made no difference.
I got a phone signal momentarily about 15 mins ago which allowed me to make a short phone call to test it. I then accepted the JB system update from Google and now have no phone signal, just data.

CM 13 mobile network problem

I have a problem on CM 13 nightly.. When i lose mobile network(no signal from my network provider), I automaticly get "r" sign over my network icon (my roaming is disabled). And i get connected to other network. If i want to change it I have to spam the automatic select network to get back to my mobile network because when I try to manualy pick it I get a message that I cant connect to this network at this moment or any other network.
If anyone found a solution or is this a CM 13 bug?

I have the same problem. I have CM13 on my D851 (T Mobile USA) LG G3. Only instead of getting the "r" sign, I get an "!" next to the signal bar. I can still make calls and send sms, just no data comes thought. My IMEI is fine, I can check it *#06#.
I just installed the latest nightly last night to no avail. The only way to fix this so far is to enter airplane mode then turn it back off again. The signal is then fine.
Aside from this and the video recording the rest of the rom is fine.

Airplane Mode on/off is not giving my baseband number back.
JDMpire said:
I have the same problem. I have CM13 on my D851 (T Mobile USA) LG G3. Only instead of getting the "r" sign, I get an "!" next to the signal bar. I can still make calls and send sms, just no data comes thought. My IMEI is fine, I can check it *#06#.
I just installed the latest nightly last night to no avail. The only way to fix this so far is to enter airplane mode then turn it back off again. The signal is then fine.
Aside from this and the video recording the rest of the rom is fine.
Click to expand...
Click to collapse
I've tried several times turning on and off the airplane mode but it's not working though. is it any other way to fix this?
Thanks.

Mr_Dkbza said:
I've tried several times turning on and off the airplane mode but it's not working though. is it any other way to fix this?
Thanks.
Click to expand...
Click to collapse
Good afternoon,
I'm using the application 'DNS changer' for change the DNS of the data mobile interface and I use Google and open dns DNS as primary and secondary dns server respectively. It is a workaround for this problem.
After making these changes, data work well and exclamation point disappears.

cellular network not available, but data works?!

[SOLVED] Installed http://forum.xda-developers.com/showpost.php?p=64023143&postcount=10 and switched back to automatic band select. Flashed back to stock and all is working again! Thanks to bitdomo!
Hi guys, now it's time for me to ask a question. In all my years with android I haven't felt so powerless
I'm experiencing a strange behavior with my N5X: I regularly get an error "cellular network not available" when trying to call someone. During that time I'm not able to make calls, receive calls and receive or send sms messages. The strange thing: LTE, H+, H, E or G connections are working during that time.
A reboot fixes the issue for some time, but after some time (minutes or hours) the issue is back. As I said, my whatsapp service and internet connection is available via LTE or similar (depends on the quality of connection), but all GSM services won't work.
I haven't changed the SIM card.
I flashed several different ROMs an kernels.
Thanks
http://imgur.com/a/K0qX2 - here you can see the issue (working H connection but no service)
Update: I removed the SIM card and cleaned it with alcohol, put it back in again and it's working for now.

I have the same problem since a couple of days. I
Will try your trick and report back if it's working.

crian said:
I have the same problem since a couple of days. I
Will try your trick and report back if it's working.
Click to expand...
Click to collapse
The issue is back... During a bluetooth connected call in my car, the connection was lost and couldn't be reconnected. "cellular network not available" was shown every time I tried to make a call after that. Internet connection over LTE was fine at the same time...

That's a strange issue. It seems after signal lost it only reconnects data but not cellular.
@Frozen-GPU are you on the newest July update of android? Maybe it is a issue with the radio.

crian said:
That's a strange issue. It seems after signal lost it only reconnects data but not cellular.
@Frozen-GPU are you on the newest July update of android? Maybe it is a issue with the radio.
Click to expand...
Click to collapse
Yes, very strange... I'm on the latest July update with XtraFactory at the moment. However the issue isn't ROM related I think, because I had it with several ROMs and builds since may, if I remember it correctly.
I found some settings in the test-menu *#*#4636#*#* to change for "GSM only" network-mode for example. Maybe that'll fix it.

I switched from LTE/4G to 3G Network in the cellular settings. And the issue doesn't appear till now.
I really think that something in the July update borged it. Before I never had this problem.

crian said:
I switched from LTE/4G to 3G Network in the cellular settings. And the issue doesn't appear till now.
I really think that something in the July update borged it. Before I never had this problem.
Click to expand...
Click to collapse
I installed http://forum.xda-developers.com/showpost.php?p=64023143&postcount=10 and switched back to "automatic band select" in *#*#4636#*#* menu. Flashed back to stock and all is working again! Thanks to bitdomo! In the end before I applied the fix, I couldn't get any GSM services anymore. LTE was working. My Nexus 5X was stuck in "USA Band", therefore I wasn't able to fix it without the bitdomo ROM. The bitdomo ROM provides a huge selection of bands, where my stock ROM only showed "USA Band".

I know I'm late to the party, but I was able to fix it by follwing #5 from here: https://www.mytechtipshub.com/mobile-network-not-available-fix-android.html
* Go to the dialer on your phone.
* Dial *#*#4636#*#* from your device.
* A testing menu will appear on the screen.
* In the testing menu, select “Phone Information” from the category.
* You will see an option that says “Run Ping Test.” Select that option on the screen.
* Now scroll down the page where you will find a drop-down menu on the right side.
* Tap it open to see its contents. Click on the option “GSM Auto(PRL).”
* Now further below, you will see an option named “Turn Radio Off.” Select this option.
* Now restart your phone and get rid of the problem for sure.
Click to expand...
Click to collapse