Develop Bugs

Has at&t turned off the 3g for att legacy customers (pre-cingular)?

I have an 8525 using an "old blue sim". I have been having problems connecting with the 3g network. "There is a problem connecting to the GPRS service in the roaming network you are in." I am able to make voice calls on the utms network, but I am unable to make a data connection.
I thought my phone had a problem, but I think it is ok. I have no problems connecting to the Edge signal just 3g. I have flashed my phone reflashed the roms and radio..
Is any one else having this problem?
I did call at&t and ask for help, but they would not even talk to me because they say they are not supporting "old blue" and I need to migrate to a new plan/sim.
This started about a month ago. I am not sure if flashing a rom maybe corrupted the radio?
Does this mean anything. Taken from the Hyper Core thread.
@PaY87
Yup, UMTS is one of the Third Generation (3G) mobile systems. I use Hypercore Kitchen, but I've removed the .rgu files from this rom so it won't be easy to rebuild it.
Anyone with an "old blue" sim still working on the 3g network?
Radio 1.54.07.00
IPL 1.04/ spl-2.10 olipro
Black Satin light/ Before that HClite 3.62
Thanks
Scott

Scott, when I got my 8525 I was told I had to upgrade my sim to a 3G sim. I did and have had no problems since.
Jim

I was told they will not change my sim unless I change plans and migrate over to the new at&t. I have a great plan. I pay about 90.00 a month for two phones 1550 anytime minutes nights/weekends start at 7 and a unlimited mmode data plan on one phone. They had a great promotion at the time and I don't want to lose it.
Scott

Maddog468 said:
I was told they will not change my sim unless I change plans and migrate over to the new at&t. I have a great plan. I pay about 90.00 a month for two phones 1550 anytime minutes nights/weekends start at 7 and a unlimited mmode data plan on one phone. They had a great promotion at the time and I don't want to lose it.
Scott
Click to expand...
Click to collapse
Unfortunatly for you the only way to change your SIM is to do what you said they said above. I have a friend that works at AT&T and he was tellign me about that not to long ago.
Just another Corporate manuever to capitalize gains within large companies, thats America for you
There are some great deals going on withen AT&T now and I'm sure If you talk to the right people (Store Managers, Customer Service Supervisors) they would set you up with a nice plan. don't upgrade the normal way, make sure you talk to someone and BE AGRESSIVE!!!

This might answer your problem,
The Boy Genius Report
Yesterday, December 26, 2007, 5:17:26 PM
Analog bids Adieu
Yesterday, December 26, 2007, 5:17:26 PM | Joshua Karp
2008 is going to be a sad year for anyone that still remembers the early days of mobile technology. Not only is the TDMA band, currently the massive monkey on AT&T’s back, set to go black, but it looks like the old school analog cellular network will also be put to rest. Analog has remained in use primarily due to its presence in rural areas that have yet to reap the benefits of the "shiny new" digital network. With the seemingly exponential increase in signal penetration by America’s wireless carriers, however, it seems that the analog bands have run their course. Fewer than 1% of phones currently in use are functioning on the analog network, but if you suspect that your handset might be one of them now would be a good time to check. As many as 500,000 GM On-Star-equipped vehicles will also be affected.
Link;
http://www.chicagotribune.com/servi.../friday/chi-cellular_webdec21,0,1030571.story
and
http://www.chicagotribune.com/servi...iday/chi-cellularbox_webdec21,0,6053828.story

just a suggestion but I went to a walmart that sold ATT phones and bought a new sim for $26. some change, and called att and got them to register it for me on my phone # without any problems. Now I have a 3G sim.

jonrobertd said:
just a suggestion but I went to a walmart that sold ATT phones and bought a new sim for $26. some change, and called att and got them to register it for me on my phone # without any problems. Now I have a 3G sim.
Click to expand...
Click to collapse
Thanks. I never thought of that maybe I will give it a try today. You just went into a store and asked for a replacement sim paid 26 bucks and your 3g has been working with on "old blue" account?
Thanks
Scott

I too have a similar issue.
I am using a 3G sim card and have an 8525 but don't have the data connect plan. Instead since I bought the phone outright I went into the store and added the Media Net unlimited Plan. Worked flawlessly on the 3G network this past year then all of sudden last week I noticed it will only connect at EDGE. Maybe there catching on to this not sure but it seems interesting all of a sudden.
O.k. sorry for the detour back to your subject. I actually had the older sim card like you earlier this year and bought one of of eBay to upgrade. They were about half the price on there as Cingy store. Then just take in to any AT&T store and they can swap your sims, at least it could be done in the past.
Good luck.

I went to two at&t stores today. I asked if I could have a replacement sim. No problem untill they looked at my account. It had "old blue" written all over it. Both stores said that they were unable to give me a new sim. One guy even showed me the computer screen. The only link that worked on the whole page was the UPGRADE button. They could not even change it even if he wanted to. He also said he has not seen an "old blue" account in about 2 years.
According to the salesman if you lose your sim they will not replace it. You will have to sign up for a new plan and contract.
It was a good idea thought it was going to work.
Any other ideas?
Thanks
Scott

Maddog468 said:
I went to two at&t stores today. I asked if I could have a replacement sim. No problem untill they looked at my account. It had "old blue" written all over it. Both stores said that they were unable to give me a new sim. One guy even showed me the computer screen. The only link that worked on the whole page was the UPGRADE button. They could not even change it even if he wanted to. He also said he has not seen an "old blue" account in about 2 years.
According to the salesman if you lose your sim they will not replace it. You will have to sign up for a new plan and contract.
It was a good idea thought it was going to work.
Any other ideas?
Thanks
Scott
Click to expand...
Click to collapse
I think you have to come to terms that you need to upgrade....sorry thats just how it is...blame Bush....9/11 was an inside job

I think your right there is not much I can do. I cannot complain I still have a great plan (price wise) even with the "edge" service.
Scott

I went to my local At&t shop told then my reception sucks, droped calls ect. The replaced mine and my wifes sim with a new 3g no questions

wk4alvn said:
I went to my local At&t shop told then my reception sucks, droped calls ect. The replaced mine and my wifes sim with a new 3g no questions
Click to expand...
Click to collapse
How long ago was this? Did you have an "old blue sim". I have had this sim for almost 5+ years maybe even longer. Did you go to a store or did you call and talk to someone from tech support?
Thanks
Scott

I have an extra 3G sim card, they sent it with a new phone, but no information is attached with it since we just used the old sim card in the new phone. Would an att store program it for one of you guys?

eagercrow said:
I have an extra 3G sim card, they sent it with a new phone, but no information is attached with it since we just used the old sim card in the new phone. Would an att store program it for one of you guys?
Click to expand...
Click to collapse
They had a pile of 3g sims there. The sales guy even showed me on the computer he tried clicking on replacement sim and nothing would happen. He clicked over the whole screen the only link that worked was upgrade. Saw it with my own eyes. The sales guy thought that all of these sims or accounts have been closed for years.
Thanks for the offer.
Scott

Maddog468 said:
They had a pile of 3g sims there. The sales guy even showed me on the computer he tried clicking on replacement sim and nothing would happen. He clicked over the whole screen the only link that worked was upgrade. Saw it with my own eyes. The sales guy thought that all of these sims or accounts have been closed for years.
Thanks for the offer.
Scott
Click to expand...
Click to collapse
Word yo, not much you can do with a Blue account. I work at an AT&T authorized retailer, and the only real option is upgrading.
One thing though, before you bite the bullet: I'm pretty sure you don't need a 3G sim to access 3G. Look over on Howard Forums (you might be better off asking this question there), but there are people even with old 32k and 64k sim's working just fine. But that doesn't mean AT&T isn't blocking it. See if you can use someone elses SIM card in the phone to connect to 3g (if it's a newer "Orange" card, make sure you have the correct internet settings).

irockash said:
Word yo, not much you can do with a Blue account. I work at an AT&T authorized retailer, and the only real option is upgrading.
One thing though, before you bite the bullet: I'm pretty sure you don't need a 3G sim to access 3G. Look over on Howard Forums (you might be better off asking this question there), but there are people even with old 32k and 64k sim's working just fine. But that doesn't mean AT&T isn't blocking it. See if you can use someone elses SIM card in the phone to connect to 3g (if it's a newer "Orange" card, make sure you have the correct internet settings).
Click to expand...
Click to collapse
The 3g service was working fine untill about week or so ago. I travel quite a bit to New York and it happened up there first. When I would get home to Ft.Lauderdale everything was fine up till about week ago. So the "old blue" would get 3g service but I am thinking this is not the case anymore.
The howard forums have a lot of information. I need to get some time and really go through and read their site. Thanks for the info I never been on that forum.
Anyone out there have a old blue sim that is still working on the 3g network?
Scott

According to my friend, it works fine. Do not upgrade unless you have to, and don't give up your grandfathered plan. IIRC, The type of sim does not control connection speed or method, but only access to the network overall.... That being said, if you do loose your old pre-cingular Blue sim, they will not give you a new one without a new plan, so don't loose it.
Further, ATT doesn't (currently) screen for tethering or use of PDA phones with data plans made for phones, so no worries there.

Just to give you a quick up date. I flew in from Boston today. My phone had no problems using 3g in up in Boston.
I guess now ATT has the abilty to turn off the 3G in certain areas for us old customers. I know for sure 3G does not work with my old blue in New York area and Ft.Lauderdale area, but worked fine up in Boston today.
So I am not even sure even if I was given a new "3G" sim that it would allow me access to the 3G network.
The fight continues for me trying to get a new sim without changing my plan.
Scott

Searching signal problem

Upgraded to 6.1 using the Rickywatt rom. Worked great (better than great actually) yesterday and today. Problem sometime this afternoon, it lost its signal and just keeps searching ... Is there something i screwed up? On Tmobile of course btw.

Thought i found the fix on the website Tmobile but doesnt work....

Did you have this problem prior to flashing to the 6.1 rom? Also, what area are you situated in?

As far as i remember no. Calling Tmobile tomorrow being that im in New york and its late. It was working fine for 24 hrs after the rom upgrade though...

dadidito said:
As far as i remember no. Calling Tmobile tomorrow being that im in New york and its late. It was working fine for 24 hrs after the rom upgrade though...
Click to expand...
Click to collapse
Yah it might be a sim card error.. try going into tmobile and requestiong a new sim card...

jdoggraz you were right!
Went into a tmobile store, they gave me a new one and it works great. When updating the rom should I have left the sim card in...?

dadidito said:
jdoggraz you were right!
Went into a tmobile store, they gave me a new one and it works great. When updating the rom should I have left the sim card in...?
Click to expand...
Click to collapse
Yeah it does not matter if you leave it in or not, overtime the sim card seems to lose its power so a good one always helps out...

Weird situation: No service after installing Lovebabyjing ROM

The reason I say this is a weird situation is because I'm actually using an old Suncom SIM card. My girlfriend's phone finally died after going through numerous drops/abuse for the past few years, so I was going to give her my old Dash. Now, the official ROM does that "network is locked" thing, so I figured I would a custom ROM. Well, I was able to start up the phone successfully and use it fully with the Suncom SIM inserted, but it does not find the T-mobile signal.
Is there a way around this, or is she going to have to go to T-mobile and have her SIM converted over to a T-mobile one?

Bkid001 said:
The reason I say this is a weird situation is because I'm actually using an old Suncom SIM card. My girlfriend's phone finally died after going through numerous drops/abuse for the past few years, so I was going to give her my old Dash. Now, the official ROM does that "network is locked" thing, so I figured I would a custom ROM. Well, I was able to start up the phone successfully and use it fully with the Suncom SIM inserted, but it does not find the T-mobile signal.
Is there a way around this, or is she going to have to go to T-mobile and have her SIM converted over to a T-mobile one?
Click to expand...
Click to collapse
is your phone sim unlock? In order to use other provider< you phone must be sim unlocked>
good luck

That's the thing though, it's not being used by a DIFFERENT provider, but actually by the SAME provider. The only problem is that the SIM card is from the old company before the two merged, so I'm guessing that makes a difference.

Bkid001 said:
That's the thing though, it's not being used by a DIFFERENT provider, but actually by the SAME provider. The only problem is that the SIM card is from the old company before the two merged, so I'm guessing that makes a difference.
Click to expand...
Click to collapse
Maybe as we have company's that use same carrier yet the sims can't be used without unlock phone.
Eg: BT, Asda both use Vodaphone yet can't have a Vodaphone or Asda SIM in a BT phone without unlock...

[SOLVED][Q] Sim card included with phone?

My G2 came with a new sim card. Any reason I should use the new one instead of the old one I have? Thanks in advance.

gjvah said:
My G2 came with a new sim card. Any reason I should use the new one instead of the old one I have? Thanks in advance.
Click to expand...
Click to collapse
No but I would save it just in case your current ever goes bad (happened to me a couple weeks ago with year old sim). It comes wit every phone.

I was going to use the new one because my old one is 9 years old but it doesn't have any of the vpn info on it so I just stuck with my old one..
Although I did read around here somewhere that a tech told someone that we should be using the new ones with the TM on the chip side?

mcp2009 said:
No but I would save it just in case your current ever goes bad (happened to me a couple weeks ago with year old sim). It comes wit every phone.
Click to expand...
Click to collapse
Thanks brother

Du22ty said:
I was going to use the new one because my old one is 9 years old but it doesn't have any of the vpn info on it so I just stuck with my old one..
Although I did read around here somewhere that a tech told someone that we should be using the new ones with the TM on the chip side?
Click to expand...
Click to collapse
can anyone elaborate on this? What does the new card have that the old one doesn't?

Please take notice that older SIM cards (and phones) had 8 metallic contacts for the SIM and the new SIM cards (and phones) have 6 metallic contacts.

Older "2G" sims only have the ability to register with the network a certain number of times. Once that registration number is reached "90,000" the SIM card dies and must be replaced. This can occur within six months for smartphones.
This means no future registrations, lost contact information, and no Voice/Data/Text Messaging capabilities.

Interesting.. I didn't know it came with a new SIM card. I popped in my old one when my G2 arrived. Opened my manual and the new SIM is in there.. Put that in and I have no service or data connection.

-RotorDemon- said:
Interesting.. I didn't know it came with a new SIM card. I popped in my old one when my G2 arrived. Opened my manual and the new SIM is in there.. Put that in and I have no service.
Click to expand...
Click to collapse
You have to call to update your SIM number for it to work.

Ah.. Well I will have to do that Monday.
Sent from my T-Mobile G2 using XDA App

-RotorDemon- said:
Interesting.. I didn't know it came with a new SIM card. I popped in my old one when my G2 arrived. Opened my manual and the new SIM is in there.. Put that in and I have no service or data connection.
Click to expand...
Click to collapse
OMG I laughed so hard reading this, I can barely catch my breath. Really I'm not trying to make fun of you or be mean, but you been a member here since 2007 and you didn't know the sim card has to be activated? This was classic.

SamsungVibrant said:
OMG I laughed so hard reading this, I can barely catch my breath.
Click to expand...
Click to collapse
Sorry but me too...
It only took a few seconds to change the SIM with the CSR and then u just swap. Was super painless...

a sim card doesn't generally give you better service or anything. sheesh. its just an identifier so tmobile could know who's who and stuff.

Unlocked GSM Galaxy Nexus - No signal al all

Hello,
A bit about my Nexus: Bought it online, it's the Domoco version, unlocked, rooted and been using just fine with many custom ROMs.
So yesterday morning, I was talking on the phone with a friend without any problem. After hanging up for a few hours, when I was about to call someone else, I realized my phone didn't have any signal at all. And it has been like that until now, about 48 hours.
It happened so suddenly without any warning. The phone has never been dropped and everything else working just fine.
So here's what I have tried:
- Restart the phone (multiple times)
- Batter pull (multiple times)
- Factory reset the phone (multiple times)
- Wipe cache and dalvik cache in CWM (multiple times)
- Downloaded SetCPU and set the minimum to 700Mhz (instead of 350Mhz)
- Reflash the ROM and tried with other Custom ROMs (I tried Xenon, Xylon, PA, and Carbon ROMs)
- Reflash the Radio and tried with other Radios too (I tried UILH1, XXLH1, SC04DOMLE3 and some others ...)
- I also went to Tmobile and request a new sim card - same problem.
- I borrowed a sim card from another Tmobile customer to try it on my phone - no signal - but the sim card works just fine on his phone.
I ran out of thing to try and I dont understand what happened ... anyone has an idea or something else for me to try ?
Anyone experience this before ?

Welcome too my hell. I have a playstore one now but my first Gnex was an international one and it has this same issue. Its a PCB problem a warranty would fix. I'm near Chicago and a few people have told me there is an electrical engineer downtown that fixes stuff like this. I don't have a price but I think something like this is your only option. Mine sadly is still a battery charger:thumbdown:
Sent from my Galaxy Nexus using xda premium

I know it sounds stupid, but have you tried toggling airplane mode? I run into the occasional loss of signal when im at work [fair to weak signal in the big metal box], and a reboot is the only thing that fixes it for me. Mines a play store model.

bodh said:
I know it sounds stupid, but have you tried toggling airplane mode? I run into the occasional loss of signal when im at work [fair to weak signal in the big metal box], and a reboot is the only thing that fixes it for me. Mines a play store model.
Click to expand...
Click to collapse
Ah yes, I actually did try that too but forgot to mention. I tried toggle airplane mode on and off, also the 2G only mode on and off. But it didn't help with anything.
Thanks for the suggestion.
JediDru said:
Welcome too my hell. I have a playstore one now but my first Gnex was an international one and it has this same issue. Its a PCB problem a warranty would fix. I'm near Chicago and a few people have told me there is an electrical engineer downtown that fixes stuff like this. I don't have a price but I think something like this is your only option. Mine sadly is still a battery charger:thumbdown:
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
So I guess I have to look for an electrician then, cause I have this phone just a little bit over a year so warranty is a no go for me.
Thanks for the idea.
PS: anyone else has more option for me ? I just wondered if I have bricked my phone ... cause I flashed lots of diff. ROMs to try out but never gotten a bricked phone before, could this be a bricked phone ?

Bricked refers to a phone that does what a brick does: nothing. It doesn't boot, it does not light or attempt to boot, it does nothing. This is a signal issue..I have no prior experience with docomo, but this thread came up on search: http://forum.xda-developers.com/showthread.php?t=1574018, maybe it'd be helpful. Have you converted it to yakju or takju and tried a google factory image?
And this: http://forum.xda-developers.com/showthread.php?t=1554150. If it is a circuit board, it kinda looks like s.o.l., and im sad to say that to you.

I wanted to let you know that I experienced the same issue. I bought the unlocked Docomo Galaxy Nexus, and had it working fine on T-Mobile for half a year, and then suddenly had no signal on Tuesday. Nothing I did - factory reset, battery in and out, sim card in and out - could fix it. Have you tried using different sim cards in your phone to see what works and what doesn't?
I figured out that my phone will accept AT&T, and actually does connect to T-Mobile while roaming (I used an international sim card). But, my phone will say "Cannot find mobile network" when any T-Mobile sim card is inserted.

chowabbajack said:
I wanted to let you know that I experienced the same issue. I bought the unlocked Docomo Galaxy Nexus, and had it working fine on T-Mobile for half a year, and then suddenly had no signal on Tuesday. Nothing I did - factory reset, battery in and out, sim card in and out - could fix it. Have you tried using different sim cards in your phone to see what works and what doesn't?
I figured out that my phone will accept AT&T, and actually does connect to T-Mobile while roaming (I used an international sim card). But, my phone will say "Cannot find mobile network" when any T-Mobile sim card is inserted.
Click to expand...
Click to collapse
I also have the same problem with the docomo phone. ATT Sim card works. Tried other's T-mobile sim cards and it doesn't work. I wonder if somehow the IMEI has been blocked by T-mobile.

wocman said:
I also have the same problem with the docomo phone. ATT Sim card works. Tried other's T-mobile sim cards and it doesn't work. I wonder if somehow the IMEI has been blocked by T-mobile.
Click to expand...
Click to collapse
I know others who bought their GNEX through the Play Store and those work just fine with T-mobile. I tried their sim cards in my phone and it doesn't work. I don't think T-mobile is intentionally blocking the docomo phones, because I'm getting T-mobile through roaming, when I use an international sim. My guess is they're doing something to the cell network that just somehow leaves our configuration out. Hopefully it's temporary, but who knows.
Worse case, I'll just purchase a Nexus 4, because I love 4G data for just $30/month with T-mobile. Anyone else got suggestions?

wocman said:
I also have the same problem with the docomo phone. ATT Sim card works. Tried other's T-mobile sim cards and it doesn't work. I wonder if somehow the IMEI has been blocked by T-mobile.
Click to expand...
Click to collapse
Alright, update on this and there' good news. I called Tmobile and they said my IMEI is actually Blocked. The reason, according to him, is that Tmobile usually sweep the network to clean up all "un-supported" devices, so my device is apparently one of them and therefore got blocked about 2 days ago.
So he said for this, he needs to escalate it to business support and they surely can unblock it for me, but I have to wait until Monday since they don't work on weekend. But well, that's surely a good news. phewwwwwwwwwwwwww !!!
So to all of you guys who are in the same situation, make sure you call Tmobile first before flashing crazy like I did LOL.
Thanks for all the help.

I'd love to know if you are able to get this unblocked and working as I have the same problem as of Tuesday. I was traveling and went into a TMO store, and they told me it was NOT IMEI blocked. In fact they looked at the IMEI and read the page and said 'it was not eligible for blocking'.

I called TMO to see if my phone is IMEI blocked, and through three levels of support the universal answer was no. I'm now fully confused because if it's a hardware issue, why did several people all have the same problem all on Tuesday. For those others who are having issues, can you see the TMO network but not connect to it? That's what I have, I can see TMO and AT&T but haven't been able to connect to either one since Tuesday.

simple23227 said:
Alright, update on this and there' good news. I called Tmobile and they said my IMEI is actually Blocked. The reason, according to him, is that Tmobile usually sweep the network to clean up all "un-supported" devices, so my device is apparently one of them and therefore got blocked about 2 days ago.
So he said for this, he needs to escalate it to business support and they surely can unblock it for me, but I have to wait until Monday since they don't work on weekend. But well, that's surely a good news. phewwwwwwwwwwwwww !!!
So to all of you guys who are in the same situation, make sure you call Tmobile first before flashing crazy like I did LOL.
Thanks for all the help.
Click to expand...
Click to collapse
I'll call up T-Mobile tomorrow and ask if they IMEI blocked my device. I had them reset my signal and give me a new SIM card, but didn't realize it could have been IMEI blocked. I'll give them a call on Monday and let you know what the result is. Maybe it won't be too late to cancel my order on that Nexus 4...

I'm quite confused. I've been told last Thursday in a TMO store and with tech support that I didn't have an IMEI block, and the same with three reps tonight. I know the Sim Card is good, and so I'm being told its a hardware issue. However, several of the same phones had the same issue on the same day, so I can't buy it's a hardware issue. Has anyone with this issue flashed a new or different radio into the phone, either before or after the service loss? I have not, running it as it came out of the box.

I just got off the phone with T-Mobile Support, and they told me the device is not blocked. The reason is that T-Mobile cannot block or unblock devices that are not registered to T-Mobile. So I'm back to square one on this.

chowabbajack - When did you first have a problem, last Tuesday? Did you prior to that do any flashing or radio changes to the phone?
We're in the same spot....

alexwinsberg said:
chowabbajack - When did you first have a problem, last Tuesday? Did you prior to that do any flashing or radio changes to the phone?
We're in the same spot....
Click to expand...
Click to collapse
I did not do any kind of flashing or radio changes prior to Tuesday, when I lost signal.

chowabbajack said:
I did not do any kind of flashing or radio changes prior to Tuesday, when I lost signal.
Click to expand...
Click to collapse
That makes me think its something to do with the radio software, because I am the same the problem overall doesn't seem as large as the number of phones I perceive were bought on the Docomo deal.

Ive been using the docomo version of the nexus as well on tmobile for almost a year and it was since last tuesday when it no longer recieved any singal. with some digging around and too many phone calls, I found that the imei number on the phone is not the same as the one under the battery. i have the generic 004999010640000 imei right now and it not sure how i got it. as i bought it unlocked.
what i have tried:
reboot, battery plug, reinsert sim, factory reset, root and flash, got a new sim card, relocked, unlocked
sim card works on other phones.
also i have called tmobile and samsung endlessly and this is what i got:
tmobile cannot unblock the imei since it is not from them.
samsung is redirecting me to their japan branch.
docomo i cannot reach.
my phone before last tuesday:
unrooted stock 4.2.1
been testing different things to see if there is any way to restore the imei
also using root explorer, i cannot find my efs folder....

I've got the same problem since last Tuesday with my GNex and T-Mobile.
Mine is not from docomo though, but the French phone provider SFR, unlocked through FDocomo apk.
Rooted phone, running 4.2.1., no changes whatsoever in the past month and it worked fine until Tuesday, so I don't think I'm responsible for having no signal.
Honestly, I am relieved to see we are quite a few to have this problem, and also very pissed at T-Mobile for causing all this. What should be the next step then? Is there any chances they fix the issue quickly? If not, I might just go to the competition. I've tried AT&T sim cards and they work fine.

vanessax17 said:
Ive been using the docomo version of the nexus as well on tmobile for almost a year and it was since last tuesday when it no longer recieved any singal. with some digging around and too many phone calls, I found that the imei number on the phone is not the same as the one under the battery. i have the generic 004999010640000 imei right now and it not sure how i got it. as i bought it unlocked.
what i have tried:
reboot, battery plug, reinsert sim, factory reset, root and flash, got a new sim card, relocked, unlocked
sim card works on other phones.
also i have called tmobile and samsung endlessly and this is what i got:
tmobile cannot unblock the imei since it is not from them.
samsung is redirecting me to their japan branch.
docomo i cannot reach.
my phone before last tuesday:
unrooted stock 4.2.1
been testing different things to see if there is any way to restore the imei
also using root explorer, i cannot find my efs folder....
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I have the exact same generic IMEI number as you, which does not match the number under the battery. I'm not liking the news that you did flash and still no go. I'm a novice at this stuff so please keep us posted.