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[Q] Nexus S no network service! What do I do?

Hi guys I have a 2 month old Nexus S and for no apparent reason all of a sudden today I noticed I am not getting any network service (australia vodafone).
I've tried removing and trying other sim cards which are known to work. My sim card works in other phones so it's nothing wrong with the sim card. Wifi still works perfectly. I've tried going in and out of airplane mode to restart the antenna and I've tried to turn it off and on again. I've also done a factory reset and erased all data through the android menu as well as the bootloader separately to no avail.
However what I also noticed is even though I did factory resets it doesn't seem to completely reset it as the android version still shows 2.3.3 which I applied using a manual update. The phone had 2.3.1 when I bought it. How do I do a full reset to send it back to 2.3.1?
The phone is still under warranty however if it is a software issue I would rather fix it myself then send it away.

I'm having the same issue. I've posted in the cyanogen forums but I'll share the issue here as well.
I'm pretty scare the radio is damaged or something...
I've rebooted my Nexus S with Cyanogen RC4 to show a friend of mine the boot animation. From that point on, I'd get messages that the application "com.android.phone" force crashed all the time.
I noticed at that point that I had no signal/radio/service.
Wifi worked properly and still works fine.
I've tried updating Cyanogen to the stable release, still no service but I stopped getting the phone crashing errors.
Tried flashing a new radio (KB3) through clockwork recovery, didn't fix the problem.
Tried flashing stock back (2.3.3 Deodexed unrooted) didn't work.
Made sure data and cache was wiped, didn't fix the issue.
I've also tried relocking and re-unlocking the device (oem lock, oem unlock), to no avail.
As a last resort, attempted to enable and disable airplane mode but no go either.
I'm pretty scared that the radio might be damaged (how would it have been damaged by a simple reboot ?) How can I tell and what further steps can I take to diagnose this ?
Right now, I'm trying to reflash cyanogen so that I try and get a dmesg on the device.
Thanks,

Additionnal bit of info.
Someone on Cyanogen forums asked me to try to flash the radio through fastboot instead of clockwork recovery..
If I do that, it is able to send the file but it seems unable to write. It gets stuck here:
fastboot flash radio XXKB1-GRI40-radio-nexuss-unsigned.zip
sending 'radio' (4126 KB)... OKAY
writing 'radio'...
(I've tried flashing both KB1 and KB3 through flashboot, same results)

Hello everyone,
I have the same issue. I turned my phone on this morning and it said "no service, emergency call only".
I used wifi to apply the OTA 2.3.4 with hope that it'd fix the issue as I read from my google searches. But it does not.
I tried flashing back to KB3 to run with 2.3.4 as well but that doesn't help.
If the phone can still do emergency call, it means the hardware is OK, right?
any suggestion? Thank you very much.
Opteron.

Did anyone ever find a solution?

you could try dialing *#*#4636#*#*, going to phone information, and looking at your preferred network type (might be the wrong one). you could also go to phone information, push menu, go to select radio band, and try a few different ones. hopefully that solves it, or you might have to flash a different radio/rom
edit: make sure you write down the original preferred network type before you change it. it could screw with what kind of service you get if you set it to the wrong one

Hi,
I am having the similar problem with my Nexus S
Tried the *#*#4636#*#* settings to EURO and GSM only but with no success.
Did anyone ever find a solution?

hi, im just wondering what type of root did you use for the AU nexus s. im not sure what root method to use for the SCLCD :S
thanks

fooraide said:
I'm having the same issue. I've posted in the cyanogen forums but I'll share the issue here as well.
I'm pretty scare the radio is damaged or something...
I've rebooted my Nexus S with Cyanogen RC4 to show a friend of mine the boot animation. From that point on, I'd get messages that the application "com.android.phone" force crashed all the time.
I noticed at that point that I had no signal/radio/service.
Wifi worked properly and still works fine.
I've tried updating Cyanogen to the stable release, still no service but I stopped getting the phone crashing errors.
Tried flashing a new radio (KB3) through clockwork recovery, didn't fix the problem.
Tried flashing stock back (2.3.3 Deodexed unrooted) didn't work.
Made sure data and cache was wiped, didn't fix the issue.
I've also tried relocking and re-unlocking the device (oem lock, oem unlock), to no avail.
As a last resort, attempted to enable and disable airplane mode but no go either.
I'm pretty scared that the radio might be damaged (how would it have been damaged by a simple reboot ?) How can I tell and what further steps can I take to diagnose this ?
Right now, I'm trying to reflash cyanogen so that I try and get a dmesg on the device.
Thanks,
Click to expand...
Click to collapse
Hello! did you find any solution or you repaired your nexus s? Im having the same problem. when i try to back to stock from Cyanogen..Any suggestion? Regards

found a solution
hi guys ! I recently had the same trouble that no signals were being received after updating to 4.1.2 but then i dialed *#*#4636#*#* and turned off the radio and turned it on again and now its all fine

No service after firmware update

So I updated my firmware (I was already superCID'd) and then when I loaded a new ROM I had no service. I have tried many different ROMs, radios and the such but have had no luck. Any advice would be greatly appreciated, thanks!

natehoch96 said:
So I updated my firmware (I was already superCID'd) and then when I loaded a new ROM I had no service. I have tried many different ROMs, radios and the such but have had no luck. Any advice would be greatly appreciated, thanks!
Click to expand...
Click to collapse
I had issues on mine as well, after reflashing it seemed to behave much better. I had a good download verified by md5, the first flash was successful by every indication, but my signal was non-existent or crap at best. After the reflash it just started working better. Give it a try!
Edit: To clarify, I mean to reflash the firmware, not the ROM. I had deleted the P58IMG file from my SD so I had recopy it over to reboot into bootloader to flash it.

mf2112 said:
I had issues on mine as well, after reflashing it seemed to behave much better. I had a good download verified by md5, the first flash was successful by every indication, but my signal was non-existent or crap at best. After the reflash it just started working better. Give it a try!
Edit: To clarify, I mean to reflash the firmware, not the ROM. I had deleted the P58IMG file from my SD so I had recopy it over to reboot into bootloader to flash it.
Click to expand...
Click to collapse
I tried that but it did not work, I dont think it even recognizes that I am on T-Mo because in the settings it says that there are no network operators and all of the network settings are blank.

Have you done a factory reset? I had the APN settings grayed out after flashing a rom. I had to simply go and perform a factory reset and start from scratch. DO NOT ERASE YOUR SD CARD. And make sure you have a rom to flash after you reset your phone.

kpjimmy said:
Have you done a factory reset? I had the APN settings grayed out after flashing a rom. I had to simply go and perform a factory reset and start from scratch. DO NOT ERASE YOUR SD CARD. And make sure you have a rom to flash after you reset your phone.
Click to expand...
Click to collapse
I tried that but it didnt change anything. I am starting to think it might be something with the SIM card or the phone reading the SIM card because in the settings it says "Please insert SIM" and Wi-Fi calling says "Reading SIM" the whole time.

natehoch96 said:
I tried that but it didnt change anything. I am starting to think it might be something with the SIM card or the phone reading the SIM card because in the settings it says "Please insert SIM" and Wi-Fi calling says "Reading SIM" the whole time.
Click to expand...
Click to collapse
Do you have another SIM to try? The TMo stores usually are helpful with stuff like that.
Still though, this sounds awfully familiar. I do remember reading something similar about the SIM not being recognized a couple weeks ago when the ICS ROMS first came out but can't remember what threads. Do some forum searches on missing SIM, SIM not recognized, stuff like that and see if anything looks helpful.
Edit: Can't seem to find it now. The only other things I can think of to try is to power off, remove the SIM, power up, let it boot completely, then power off, replace the SIM, and power back up. If that doesn't work, I would try flashing an appropriate RUU from here. Be careful to pick the right RUU for your area and carrier. To flash the RUU, just connect the USB plug from your PC to the phone and doubleclick the RUU exe file to start. It should find the phone and do everything necessary, firmware, radio, partitions, etc. and put you back on a stock ROM. You can flash CWM or 4EXT recovery and then whatever ROM you want.

The one I remember reading about, the guy replaced the Sim card and it fixed his no service issue.

galaxys said:
The one I remember reading about, the guy replaced the Sim card and it fixed his no service issue.
Click to expand...
Click to collapse
Yes I remember replying to that thread as well. That guy bought that phone on craigslist or something and used his old sim, not the sim that comes with the phone itself.
Go to a tmo store/kiosk at the mall and ask to test out a different sim for the phone and see if that works.

[Q] S3 Won't activate, make calls, or get past activation screen.

I've figured out how to fix it! First, I went to Section 5 of this http://forum.xda-developers.com/showthread.php?t=1762709 thread and odin-ed back to stock. Next I fixed my IMEI using a guide I found on xda. It was the second part of thishttp://forum.xda-developers.com/showthread.php?t=1804117 thread that says "IMEI is already corrupt".
Next, I did a bunch of things that I don't think I should have done and I ended up with a soft brick phone so I went and flashed back to stock via odin by following this http://forum.xda-developers.com/showthread.php?t=1840030 guide. I don't really know if it was necessary and I ended up getting stuck on the activation screen. If at any time you can not get past the activation screen, the third post down from here shows how to get past it so you could go to your settings and check them out or unlock your bootloader or whatever it is you need to do. But this whole part may not be necessary.
This is the part that I think completely fixed the phone. Probably the most important part of this whole guide. You have to dial *2767*3855# from a completely stock rom (root66 or others). It factory reset my phone and somehow the calls work, although it always says I'm roaming
A couple days ago I rooted my s3 and flashed the CM10.1 ROM. It had problems with mobile data and connecting to 4G and phone calls, so I tried out a bunch of different ROMs before deciding it had to be something else.
I figured out that my IMEI had been erased and since I didn't have it backed up (and I have no idea where my nandroid backup is or what happened to it) I had to manually restore it using some NV items reader writer tool and some other similar tool. It worked but there was something else, I think it was called ERI, was set to none. I kept trying stuff and ended up doing a factory reset. I attempted to unroot my S3, I have no idea if I succeeded in unrooting.
What I just did was soft brick my s3, not completely sure how, but I did then re flash root66 using odin successfully and now I'm back to the activation screen. Now it is stuck trying to activate the phone, but it fails every-time, and I can't do anything but restart the phone. So I restart the phone and have to go through the set up screen again and it tries to re-activate but fails and goes through the whole thing again.
Could someone please help me?
According to the Verizon website the phone is activated.
Update 8:24 PM EST: I have gotten past the activation screen but it says that the phone is out of service and when I try to call someone it says that the "mobile network is not available". Please help.

Since nobody is here to answer me, I will post the answer once I figure out what to do, just in case somebody in the future has the same problem.
I'm going to start by re-rooting my phone. I'll let you know how that goes and if anybody else could help me out that would be great. Thanks.
UPDATE 7:45PM EST:
I successfully re rooted the phone via odin and tried to start it up to no avail. Next I tried to flash a ROM, but I must have forgotten to unlock the bootloader since I couldn't even get the phone to boot completely. Right now I'm flashing back to the vzw root66 rom and then I'm going to re root and try to unlock the boot loader.
UPDATE 8:07PM EST:
I finally figured out how to get past the activation screen and I unlocked my bootloader. Before I flash AOKP I'm going to see if I could fix everything else. I think I'm pretty close to a solution. If anybody else is having the same problem send me a message or reply here, I'll try to answer your questions if you let me know what you've done.
I really just need a way past the activation screen. After that I think I could figure out what to do.

Sorry your having problems. I wish I could help but never ran into that problem so everything you said went over my head otherwise I would of fine a lot of research. At least now you are learning more and more.I just figured I would respond since no one else did.Good luck.
Sent from my SCH-I535 using xda premium

http://forum.xda-developers.com/showpost.php?p=30182790&postcount=1
Have you tried this?

defkult said:
http://forum.xda-developers.com/showpost.php?p=30182790&postcount=1
Have you tried this?
Click to expand...
Click to collapse
Yes, I managed to bypass the activation screen but now I still can not make any calls.
mikeman45 said:
Sorry your having problems. I wish I could help but never ran into that problem so everything you said went over my head otherwise I would of fine a lot of research. At least now you are learning more and more.I just figured I would respond since no one else did.Good luck.
Sent from my SCH-I535 using xda premium
Click to expand...
Click to collapse
Thanks.

Well I suppose it is hard for a phone to make calls when it isn't activated.
Goodluck on your quest though.

Thanks for the help, I finally got it working.

myoussef0 said:
Thanks for the help, I finally got it working.
Click to expand...
Click to collapse
What was the main problem?
Sent from my SCH-I535 using xda premium

In case someone else has this problem...When I flashed pure 4.2.1, I couldnt get past activation and then found out how to bypass the screen. Tap once in each corner of the screen to bypass activation screen. Then once at home screen go to settings>more(right below WiFi/Bluetooth/data)>mobile networks>CDMA subscription. NV will be selected, change it to RUIM/SIM. Reboot phone. Worked perfectly for me.

No mobile network found
jmarch said:
In case someone else has this problem...When I flashed pure 4.2.1, I couldnt get past activation and then found out how to bypass the screen. Tap once in each corner of the screen to bypass activation screen. Then once at home screen go to settings>more(right below WiFi/Bluetooth/data)>mobile networks>CDMA subscription. NV will be selected, change it to RUIM/SIM. Reboot phone. Worked perfectly for me.
Click to expand...
Click to collapse
Thanks for this post. I ran into the same problem (flashing CM 10.1) with my first S3 phone but did not know how to fix it (wish I saw your post ahead of time). I returned phone to stock via Odin and was able to exchange for a second S3 phone via Verizon (since I have phone insurance). I flashed AOKP ms 1 (jb 4.1.2) on second S3 phone and noticed it was hanging on activation and also said no mobile network when trying to make a call. Luckily, the phone spontaneously rebooted on its own and then started working. Previous to my first S3 phone, I had a Galaxy Nexus. Never ran into any problems with the Galaxy Nexus and almost tempted to go back to it since the S3 seems buggy when flashing a new rom. I am afraid I'm going to brick yet another S3 and be out $400 since I don't think phone insurance will allow me to exchange a second time since this probably alert them to the fact that I'm flashing custom roms.

Also, under mobile networks>system select be sure to change from home to automatic. Reboot.

jmarch said:
Also, under mobile networks>system select be sure to change from home to automatic. Reboot.
Click to expand...
Click to collapse
All was working fine until I tried to do this. At first nothing was selected and everything was working, but when I tried selecting automatic and rebooted it selected home for me and it is impossible to change back to automatic without it automatically changing it back to home against my will.

please help

hello
I have just got my galaxy tab2 10.1
android 4.0.3
first I worked on WiFi as well, I insert my SIM and reboot and I lost my WiFi connection the WiFi is working but can not find my net signal,also I tried different SIMs ,also removed the SIM,the problem can only solve by factory reset ,any other way to fix ??
thanks

any suggest?

sounds like your best bet would be to just factory reset with the sim card in it. Taking the sim card out and putting it back in has apparently confused your tab and the only way to fix it would be for the sim to re-validate with your carrier after seeing a fresh install. you might be able to try the setup wizard but i dont see that revalidating your sim since its already verified. Factory reset isnt end of the world, if you start rooting and flashing custom roms you'll get real used to resetting up your tab/phone in minutes from a fresh wipe.

No mobile data after flash. Nothing will bring it back

>> Partial solution was found; still looking for the root of the problem. <<
I recently decided to take the plunge and root my OnePlus One and install sultanXDA's CM 13 ROM on it. It was all going well until I booted up into the ROM and discovered that I couldn't get any mobile data. Everything else was working, calling, texting, wifi, but mobile data seemed to refuse to work. Since I initially flashed sultan's ROM with TWRP 3.0.0, I suspected it was a problem with my modem. Though unable to install TWRP 2.8.6.0 to re-flash everything, I did still flash a new modem via ADB. This didn't help.
I have tried many things to fix this. I rebooted/reflashed. I flashed different ROMs. I tried flashing on TWRP 2.8.6.1, though I believe that one has the same modem problem as the versions after it. As mentioned above I tried flashing a modem over ADB. I took out and re inserted my SIM card. In the end, I tried this guide here to restore my phone to it's original state. The guide flashes the stock versions of everything via ADB. Though it did return me to unrooted COS 12.1, it was not able to resolve my data problem.
After the total reset, all I can think that could be causing it is a hardware problem or that it is caused by something not reset in the 100% restore above.
If any of y'all can help my solve this, or at least offer insight, I would be very grateful.
Preemptive Edit I Guess: This thread was just suggested to me while writing this. I'm going to try the solution here and report back. It's OnePlus' reset to stock method. I'm not expecting much after my first 100% reset attempt, but we'll see.
EDIT: Ok, so the solution above fixed my problem... (edit again: turned out to only be a partial solution. See below.)
I would feel really dumb right now if it weren't for the fact that I slaved over this problem for a good ~8 hours before writing this post. Anyways, I'm not sure how to delete this post or mark it as solved. Sorry for the trouble y'all.

Never delete this post !!
I have the same problem, and I spent much more time to find a solution.
I will try this and will update.
Is it a clean stock rom?
Edit:
Didn't help for me ..
Still the same problem, No mobile internet connection.
Thx anyway.

Yeah, actually I was too hasty is identifying this as the solution. For me, the stock reset brought me back to CM 11 which didn't have a problem with mobile data. But if I try to flash a later ROM or update via OTA, the problem returns. I'm still trying to figure out what is causing it. The only information I can find points to it being a modem problem or APN problem, but I'm sure I have sufficiently checked both of those already.
Either way, I'll keep looking. If I find something I'll return here with it. Good luck

arkasa said:
Yeah, actually I was too hasty is identifying this as the solution. For me, the stock reset brought me back to CM 11 which didn't have a problem with mobile data. But if I try to flash a later ROM or update via OTA, the problem returns. I'm still trying to figure out what is causing it. The only information I can find points to it being a modem problem or APN problem, but I'm sure I have sufficiently checked both of those already.
Either way, I'll keep looking. If I find something I'll return here with it. Good luck
Click to expand...
Click to collapse
Try this:
1) Download the latest fastboot images from here: http://forum.xda-developers.com/oneplus-one/general/official-cm11s-roms-ota-updates-t2906746
2) Go here and follow step #8: http://forum.xda-developers.com/oneplus-one/general/guides-bacon-timmaaas-how-to-guides-t2839471
3) Then follow step #2 to install a new recovery (you need to make sure to use TWRP 3.0.0 or the unofficial TWRP if you want to flash modems/firmwares correctly)
4) Download the latest ROM of your choice and install via your recovery

ryanmat said:
Try this:
1) Download the latest fastboot images from here: http://forum.xda-developers.com/oneplus-one/general/official-cm11s-roms-ota-updates-t2906746
2) Go here and follow step #8: http://forum.xda-developers.com/oneplus-one/general/guides-bacon-timmaaas-how-to-guides-t2839471
3) Then follow step #2 to install a new recovery (you need to make sure to use TWRP 3.0.0 or the unofficial TWRP if you want to flash modems/firmwares correctly)
4) Download the latest ROM of your choice and install via your recovery
Click to expand...
Click to collapse
I gave this a try, but booting up after step 3 I still had the same problem. If I understand this method correctly, I think it is essentially the same as the other full restore methods I tried.
I think I may have found the problem though. I was looking at OnePlus' guide to installing OxygenOS. In it they said, "do not try to flash this build through TWRP. You will most likely lose your radio and IMEI which means a trip to our customer support." At this point I have repeatedly reset/restored my modem/radio so I don't think that is the problem, but I haven't seen anything about IMEI before. The IMEI is apparently stored in the EFS partition which as far as I can tell, is not touched by any of the restore methods I have tried. I took a look at my IMEI (about phone -> status) and it turns out my IMEI SV is 00. It's supposed to be a 16 digit number. I found a guide to fixing it, but I think I will just contact OnePlus customer support first.
I'll be back later with my results.

arkasa said:
I gave this a try, but booting up after step 3 I still had the same problem. If I understand this method correctly, I think it is essentially the same as the other full restore methods I tried.
I think I may have found the problem though. I was looking at OnePlus' guide to installing OxygenOS. In it they said, "do not try to flash this build through TWRP. You will most likely lose your radio and IMEI which means a trip to our customer support." At this point I have repeatedly reset/restored my modem/radio so I don't think that is the problem, but I haven't seen anything about IMEI before. The IMEI is apparently stored in the EFS partition which as far as I can tell, is not touched by any of the restore methods I have tried. I took a look at my IMEI (about phone -> status) and it turns out my IMEI SV is 00. It's supposed to be a 16 digit number. I found a guide to fixing it, but I think I will just contact OnePlus customer support first.
I'll be back later with my results.
Click to expand...
Click to collapse
Are you flashing each of the extracted .img files from fastboot, exactly like the guide shows, or are you doing something else?

ryanmat said:
Are you flashing each of the extracted .img files from fastboot, exactly like the guide shows, or are you doing something else?
Click to expand...
Click to collapse
Yep, I ran each command listed in the guide and my phone was definitely in fastboot. Each command had a collections of "OKAY"s and ended with a "finished", which I assume means it executed as expected.

I have tried 2 different sim cards in my OPO (of two different companies, one of them as mine), and mobile data worked perfectly. Is it possible that my phone is ok and the problem happened in the sim card?
AND... my IMEI SV is 00 too. please update here if it has a connection.
Thank you !

omersa99 said:
I have tried 2 different sim cards in my OPO (of two different companies, one of them as mine), and mobile data worked perfectly. Is it possible that my phone is ok and the problem happened in the sim card?
AND... my IMEI SV is 00 too. please update here if it has a connection.
Thank you !
Click to expand...
Click to collapse
I'm not entirely sure what you're saying. Did it not work with the first SIM card, but it worked with the second?

Mobile data problem was occured (to me), after I rooted my OPO and tried to flash a new rom.
I still can't understand how it convinced my sim card, but the fact is that I tried two (to be sure) other sim cards which are not mine, and mobile data worked well.
When I returned my original sim card, problem started again.
So I am almost sure that sim card has a connection, but can't understand why. And why it happend precisely now, cause it worked well over two years.

omersa99 said:
Mobile data problem was occured (to me), after I rooted my OPO and tried to flash a new rom.
I still can't understand how it convinced my sim card, but the fact is that I tried two (to be sure) other sim cards which are not mine, and mobile data worked well.
When I returned my original sim card, problem started again.
So I am almost sure that sim card has a connection, but can't understand why. And why it happend precisely now, cause it worked well over two years.
Click to expand...
Click to collapse
sorry to intrude...but looks like mine problem too...but no connection with provider at all...and it worked 1 month normal (stock opo)..
could u flash the modem to resolve this problem?
jpvr
http://forum.xda-developers.com/one...e-plus-one-t3030545/post65841063#post65841063

Why don't you flash twrp flashable modem?
If your network is present but no data , mostly data service problem. Are you pay your mobile bills ?
Are you activate data services ?
Try this
https://www.androidfilehost.com/?w=files&flid=28032

drmuruga said:
Why don't you flash twrp flashable modem?
If your network is present but no data , mostly data service problem. Are you pay your mobile bills ?
Are you activate data services ?
Try this
https://forums.oneplus.net/threads/cos-12-master-fix-thread.307446/
Click to expand...
Click to collapse
...yes i paid my bills ..
- my network connection to provider is dead...it worked perfecly for 1 month out of the box (see original posting for detailed action i took) this thread is about lack of data connection...but also MODEM related???
- tried the brand new simcard in my old Samsung sII... works perfetly, network connection with provider, data connection and calling..so no simcard problem

Long shot. Change any APN settings from IPv6 to IPv4. That was my problem when I had text/voice but no data.

I made a post on this and then called att gophone, due to seeing other sims working on this thread, and he helped me to fix. Posting my fix here in case others with isue find this post instead of mine.
Turned off wifi.
Turned off cellular data.
Went to APN and changed the apn (ATT Go Phone) from pta to nxtgenphone.
Turned on cellular data.
Finally had H+ above he signal bar, but had an X inside the bar.
Don't know if he did anything on his end, but the X went away after a couple of minutes.
Data was working, albeit kinda slow.
Turned off phone for three minutes per ATT rep.
Rebooted.
Data still slow, but it is at least working. Thinking I need to flash different modem. Battery usage has been higher the last day or two since I flashed c7 anyways.