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[Q] Help! Invalid Sim Card? Tried everything!

Hey Guys,
I need some help with my G2x. Everything was working absolutely fine with it. I updated, modified the phone etc everything working great. One night, I'm sitting here and I pick up my phone to use it. I notice it says invalid sim card and I have no signal. I figured either T-Mobile had a problem or maybe I just needed to hard reboot. I did that, nothing. It finds the network for t-mobile, but it can not connect. No matter what I do, INVALID SIM CARD. I restore it, INVALID SIM CARD, NVFLASH restore to factory, INVALID SIM CARD. It was working completely fine and then one night it just crapped out and it's been over a month. I can't figure out what to do. I went to a t-mobile dealer today and got a new SIM card, it says the same thing! INVALID SIM INVALID SIM INVALID SIM.
I don't really know what to do at this point, I've tried everything.
I searched all over the forum, heard suggestions from call t-mobile to restore etc but nothing is working here.
My last ditch effort is to try unlocking the phone. I'm waiting for the unlock code now, but I'm really hoping that someone with more experience might know what I'm dealing with here and hopefully lend a helping hand in terms of some advice.
It'd be greatly appreciated. I'm fairly saavy when it comes to recovering bricked phones, etc. but I've never had an APN issue where the APN is good to go and the SIM works in other phones, etc. but not mine including when a t-mobile dealer actually links a brand new sim to the phone and it still isn't working, etc. No clue what's going on but I'm hoping unlocking the phone will help. Any help would be really appreciated.

Sorry to hear that happened. Did u try a different sim?
Sent from my LG-P999 using xda premium

yes no sim card is currently working on it.
I just unlocked the phone, it does not fix the problem.
It continues to say invalid sim card. :-(
---------- Post added at 04:52 PM ---------- Previous post was at 04:19 PM ----------
In the settings menu when I go to APN's it has the t-mobile apn and everything is correct. I go to network operators and ATT, T-MOBILE US and T-MOBILE GSM come up, but when I try to connect to any one of the three it says "unable to connect to this network at this time. Please try again later" I am mystified. I've tried everything I can think of.
---------- Post added at 05:01 PM ---------- Previous post was at 04:52 PM ----------
Another point to make.
When I put in the sim card, even though it's NOT registering to the network and every card says INVALID SIM CARD, I received a notification telling me that I had a voicemail......... when I put my sim card into another phone and called my vm, I did indeed have a v/m.... so I don't believe the phone is shot, I believe something is just very wrong and I don't understand what it is.

You need a new similar, this happened to me, I rooted my g2x and it said invalid similar, if u show T-Mobile they will give u a free one
Sent from my LG-P999 using XDA App

cwa542 said:
You need a new similar, this happened to me, I rooted my g2x and it said invalid similar, if u show T-Mobile they will give u a free one
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
I went to a t-mobile dealer today and got a new sim card. It STILL says invalid sim card.

Go to T-mobile or call get a new Sim card stay until it works are do a phone exchange but stay until they fix the problem your phones is still under factory warranty of they can't fix the problem they violate the contract
Sent from my LG-P999 using xda premium

have you tried a full wipe then flashing a new rom?
simple method to try

Multiple times.
I've NVFlash recovered to stock.
I've flashed multiple different roms.
I'm wiped everything over and over, hard rebooted many times over.
Completely formatted the phone and recovered, etc.
I've tried a million things.
When I put the card in, T-mobile comes up for a second then goes away and says invalid sim card. I went to a t-mobile dealer, they gave me another sim card and it's the same thing. I really just don't know what to do. I feel like I've tried everything.

Do you have another T-Mobile phone, or any unlocked GSM phone, you can use to test the sim card? At least that way you can determine if the problem is with your phone or the actual sim card.
Sounds like an issue with your phone, but its always good to be sure.

phburks said:
Do you have another T-Mobile phone, or any unlocked GSM phone, you can use to test the sim card? At least that way you can determine if the problem is with your phone or the actual sim card.
Sounds like an issue with your phone, but its always good to be sure.
Click to expand...
Click to collapse
Sim works fine in my tablet. both data and voice/etc. it's definitely the phone. I am lost.

deadly1 said:
Sim works fine in my tablet. both data and voice/etc. it's definitely the phone. I am lost.
Click to expand...
Click to collapse
if thats the case, then whats your warranty status?
they can replace the phone for you if the SIM card slot is defective

Unroot make , update to 2.3 if u haven't already and re root
Sent from my LG-P999 using XDA App

Sounds like your baseband code got corrupted or your baseband chip went bad. Restore it and do a warranty swap if you can. No way to reflash baseband at this time on the G2X.

jboxer said:
Sounds like your baseband code got corrupted or your baseband chip went bad. Restore it and do a warranty swap if you can. No way to reflash baseband at this time on the G2X.
Click to expand...
Click to collapse
he might still be able to re flash the baseband via this method, especially if he still has the old one http://forum.xda-developers.com/showthread.php?t=1180331

wyldkard said:
he might still be able to re flash the baseband via this method, especially if he still has the old one http://forum.xda-developers.com/showthread.php?t=1180331
Click to expand...
Click to collapse
Yes, if that works it will flash the new baseband and return his phone to GB stock. Worth a try.

hey guys... no warranty. It's fix it or I'm screwed, unfortunately.
It sounds like you guys identified the problem with the baseband corruption..
I'm going to try and do all methods suggested in the thread including unrooting and updating to gingerbread, rerooting... and also flashing the baseband...
I'll be back with some results!
Thanks for all of the suggestions, I'm obviously hoping I can resolve this!
Thanks again

I got "invalid sim" only when trying to start wifi calling and booting to CWM and wiping the cache and rebooting solved the problem.
If nothing works for you get a new sim card from t-mobile.
T-Mobile also had some funny setting in my account and after several hours with tech support and providing a sim card (phone number) of friend of mine they fixed it. As in ..my phone worked fine with my friends sim card but not with mine.

[HELP] I am having the same issue. I have a T-Mobile G2x/P999. I have had at least 10 roms without issues on the device. I flashed to CM7.0.1.0 stable and bam I have an Invalid sim card, I have tried to unroot, stock flash, NVFlash to stock, trying a different rom altogether with no avail. I have tried NV BAT Flash with NVFLash and nothing. I have found many post about CM7 after of course I flashed mine. My previous sim was new in April of this year, but I went to T-Mo and get a new one today with nothing. I to have wiped, licked, and spanked my phone with no results... CAN ANYONE HELP?? Can't even send it back in because I cant unroot it... HELP!!!!!

firemedic0911 said:
[HELP] I am having the same issue. I have a T-Mobile G2x/P999. I have had at least 10 roms without issues on the device. I flashed to CM7.0.1.0 stable and bam I have an Invalid sim card, I have tried to unroot, stock flash, NVFlash to stock, trying a different rom altogether with no avail. I have tried NV BAT Flash with NVFLash and nothing. I have found many post about CM7 after of course I flashed mine. My previous sim was new in April of this year, but I went to T-Mo and get a new one today with nothing. I to have wiped, licked, and spanked my phone with no results... CAN ANYONE HELP?? Can't even send it back in because I cant unroot it... HELP!!!!!
Click to expand...
Click to collapse
Yikes! Thats taking phone sex to a whole new level ... Did you try removing the battery and sim card, waiting a few seconds and then reinserting and rebooting?
Sent from my LG-P999 using XDA App

Yes I have done everything possible... Before the CM7.0.1.0 rom was installed, my baseband was from March 2001, now it reads July 2011. I have tried to switch back to the prevoius Baseband, but it wont let me either.

Can't make calls or have any service

So I recently flashed the CM10 M2 rom on my verizon GS3 and it worked good for a week. Now I can't get any service on the phone.(calls, internet, etc).
I flashed it back to bone stock using Odin and still didn't do the trick. I thought it might be the SIM card but I tested it with my old Droid Razr and it worked fine. Any solutions? I really want this phone functioning again. thank you

Kinda new to Samsung and Verizon but from what I read, u may have list your imei, you can look up tutorials on you tube on how to restore it if u backed it up, or how to install default ones. Happened to me and I had to do a factory reset and re root
Sent from my PC36100 using xda premium

chupafaros said:
Kinda new to Samsung and Verizon but from what I read, u may have list your imei, you can look up tutorials on you tube on how to restore it if u backed it up, or how to install default ones. Happened to me and I had to do a factory reset and re root
Sent from my PC36100 using xda premium
Click to expand...
Click to collapse
wasn't sure on how to restore default imei. I did an unroot and re-root and still didnt work. still need help

still in need of help I noticed my IMEI was at 0 so went through a long process to restore it. Now I do have a number under "IMEI" but mobile network still isn't working. I'm currently running stock everything. please and thank you

Well if your like me, you now believe you have a $700 brick. Well I had t he same issue, and I'm rolling done the highway typing this post on my phone. Just fixed it today in fact. This is what I did to fix it. I have a vzw sgs3. Flash it to stock. Flash stock modem fw. Search the forum for restore imei guide tool. Follo those instructions and you'll download a file with a panda icon. after that, when it turns on you will still have no service. This is ok. Search the forums for SIM reprovision. One of the posts tells you to back up everthing including your internal sd. Do that if you want your stuff. Then it will tell you to dial *2767*8858#. (I know these are the wrong numbers but they are in the *xxxx*xxxx# format and it starts with *27.) This should do it.when it reboots it's like a factory reset. But it fixes it. Oh and I also had Verizon give me a new SIM. To 're cap... search Guide imei restore tool and SIM provision.hope this helps.

mrfishjosh said:
Well if your like me, you now believe you have a $700 brick. Well I had t he same issue, and I'm rolling done the highway typing this post on my phone. Just fixed it today in fact. This is what I did to fix it. I have a vzw sgs3. Flash it to stock. Flash stock modem fw. Search the forum for restore imei guide tool. Follo those instructions and you'll download a file with a panda icon. after that, when it turns on you will still have no service. This is ok. Search the forums for SIM reprovision. One of the posts tells you to back up everthing including your internal sd. Do that if you want your stuff. Then it will tell you to dial *2767*8858#. (I know these are the wrong numbers but they are in the *xxxx*xxxx# format and it starts with *27.) This should do it.when it reboots it's like a factory reset. But it fixes it. Oh and I also had Verizon give me a new SIM. To 're cap... search Guide imei restore tool and SIM provision.hope this helps.
Click to expand...
Click to collapse
I would like to first thank you for your input. Although i had that panda icon program i used a different program to restore my imei as well as my eri. After doing that i thought i finally fixed it then realized im still missing some of the numbers under phone status such as MIN. PRL version and ICCID. does the sim reprovision fix this.

Thank you all who have gave me advice to fix this problem. I finally got it fixed and i can't be happier. After going through circles restoring my IMEI and PRL it still wasn't working. What did the trick was dialing *2767*3855# which did a factory reset. My mobile is working again!!!!!!!!!!!!!:highfive:

Galaxy S3 I535 no service after rom install

First off let me thank anyone who has any suggestions on the topic. So i made a nandroid backup but i didnt know anything about an efs folder backup so now my phone cant make calls receive calls or make texts. The status says network searching for service mobile network type unknown:0 service state out of service and my PRL version is 0. my baseband version is i535vrlf2. So i have tryed using oden but my phone does not like to play well with my phone allways having problems with a pit file.I have tryed *2767*3855# in my dialer and it said mobile network not available. Im not sure if getting a new sim would get my service back or not please help. I have also tryed to restore my nandroid backup but it wont work for some reason. Thanks

I'm having the same issue If you figure it out, let me know, I'm trying to do the same.
http://forum.cyanogenmod.org/topic/63816-network-problem-with-cyanogenmod-101-1218/
That link has some info that seems to be related

ok
will do ^_^ if you find anything could you pass it along to me aswell. thanks!

fixed!!! maby?
please go onto rootzwiki and look at the post by blaineevans and thank blaineevans! lol it worked for me as far as i can tell. make sure you have a backup or atleast a rom you can install and use the termanal method it worked. at first my phone wouldnt boot so you have to install a rom after it

Did you lose your IMEI and/or ERI?

pdykstra said:
Did you lose your IMEI and/or ERI?
Click to expand...
Click to collapse
well i had restored it yesterday via rev skills but everything is working now as far as service. now it is telling me insufficient storage available when i try to download from google play grrr fix one problem and run into another...

Rev skills?

Dropping data and no calls/texts. Advice please.

Just in case this post gets moved, I want to identify my device as the Verizon Samsung Galaxy S3 (i535).
To give a little background on my issue, I have an issue with the device. When I first got it back in July, first thing I did was root the device. Naturally, since it was a new device, I was working with experimental methods... a couple weeks ago I thought to download CyanogenMod 10.1 (nightly build) to flash it with 4.2 and rid myself of the persistent OTA update that as we all know could not effectively install because of the measures I took to root. So, I boot into recovery and flash my custom rom. BAM! As it turns out, I did not have an unlocked bootloader and my phone was now teetering on the verge of being a $600 paperweight. I got that dumb yellow triangle saying unofficial firmware detected or some nonsense like that... Anyway, I look around the internet and decided that I was going to revert back to a stock rom using Odin, and then proceed to unlock my bootloader and root the device (I followed method 3 here) I used some touch recovery console that I have never heard of before (backups incompatible with ClockworkMod recovery) and something must have failed because my back up would not flash. I took the hit on losing most everything and reflashed successfully the custom rom mentioned earlier.
After about a week, I noticed the device began to drop data. 4G would just stop at random parts of the day, and I would have to disable and enable the data to get it to reconnect. At this point I was still able to make and receive phone calls and texts. After about 3 days of this, I concluded it was more than likely a bug in the custom rom, and that I could not live with it... so I redid the a fore mentioned tutorial and left the phone as a stock/unlocked/rooted device. The data issue continued, but with a twist. I was now unable to make or receive phone calls or texts. No matter what I did, I could not do anything and the 4G would only stay connected for a matter 5 minutes or so. When I logged into my vzw account, it identified my device as an unknown non-verizon device. Customer service walked me through various soft/hard reset techniques and nothing worked. They also suggested I try a new SIM card, which failed to work.
So, I turn to the bright minds of the android community. I have already decided not to invoke the Verizon warranty offered, where the result is they take my malfunctioning phone in flawless cosmetic condition and replace it with a "like-new" phone in working condition, because I think it's garbage that a warranty would give out used crap (should fix or replace). I have not contacted Samsung customer support yet because I wanted to see what my options were. I've already attempted flashing different radios and nothing seem to make any difference. If I have to, I will revert it back to stock again and invoke Samsung's warranty program, but I would much rather keep the phone. As it sits, I am stuck with my Motorola Droid Razr Maxx, and that just doesn't cut it.
So I ask, is there anything that can be done? Anyone know of a fix for my situation? I saw something about this in my quest for an answer and I don't know if my situation is a fit for this fix. If anyone has any knowledge of my issue and a work around for it, it would be greatly appreciated. I am at my whits end.

It sounds like you've done your homework on your problem.. The only thing in your post I didn't see was your sim card.. Maybe pulling it wait 2min restart. Shut down and insert,, or maybe a reprovision of the sim may be in order..
Ahaaaa....!!!

If your IMEI is intact, I would say to flash to ICS and reprovision the phone as suggested above. If it is not, you need to restore it with that backup that you made some time ago.
If it were me, I would reprovision, that is easy to do and I honestly think that it will work for you. If that works for you, reroot and restore your backup for TW ROM and you will be fine.

HHF2 said:
If your IMEI is intact, I would say to flash to ICS and reprovision the phone as suggested above. If it is not, you need to restore it with that backup that you made some time ago.
If it were me, I would reprovision, that is easy to do and I honestly think that it will work for you. If that works for you, reroot and restore your backup for TW ROM and you will be fine.
Click to expand...
Click to collapse
Well that's just it... I don't know anything about the IMEI and how to determine if that is the issue. If by reprovision you mean reflash back to stock, that is it's current state, and that did not resolve the issue.
As for the other comment in regards to the SIM card... I have already attempted that method, and it did not work. Also, a new SIM card was also tried, and had no success.

mkruluts said:
Well that's just it... I don't know anything about the IMEI and how to determine if that is the issue. If by reprovision you mean reflash back to stock, that is it's current state, and that did not resolve the issue.
As for the other comment in regards to the SIM card... I have already attempted that method, and it did not work. Also, a new SIM card was also tried, and had no success.
Click to expand...
Click to collapse
Google reprovision, it is a number combination that you enter on the keypad that resets your phone. I had a similar problem that you are having and that fixed our for me. You also need to know that when you do this, it will erase all of your information on the phone. It will be just like it was when you unpacked it and powered it on the first time.
You will have to be on ICS because they removed the option to do this with JB. Just search for the code to enter and you will be fine.

HHF2 said:
Google reprovision, it is a number combination that you enter on the keypad that resets your phone. I had a similar problem that you are having and that fixed our for me. You also need to know that when you do this, it will erase all of your information on the phone. It will be just like it was when you unpacked it and powered it on the first time.
You will have to be on ICS because they removed the option to do this with JB. Just search for the code to enter and you will be fine.
Click to expand...
Click to collapse
Ok. So I tried the reprovsioning mentioned above. When my phone rebooted I was on data and able to make phone calls. Score! However, I checked the IMEI and it said 0. So, thinking that it was just a matter of time before my device began to stop working again... I did the IMEI fix. Now my phone is placing calls and holding data without issue. The OTA updates are flooding in and installing without issues.
I would like to point out, while I feel better having done the combination of both reprovisioning and IMEI fix, ultimately the initial reprovisioning did appear to resolve the issue.
Thanks to everyone for the assistance provided.

[Q] NV_DATA.BIN and BAK Files Missing - Thus no service what-so-ever

ok so here's the deal folks. I've been trying to fix this problem on my ATT Skyrocke since the 21st. I had flashed a copy of the Liquid Smooth ROM with all data working. Bear in mind, this S2 is net unlocked and APN settings are changeable with my sim card in, and everything is set to Straight Talk APN settings. When LS ROM was installed, everything worked fine, til this fateful day of the 21st where everything just stopped... No network, no data, no nothing. Every once in a while my network shows up and allows me to make short phone calls ranging from 45 seconds to 10 minutes, and sms/mms are even more widely spread on being able to receive. After going through my EFS folder, it seems that the phone is missing a critical file named nv_data. I have everything else in the EFS folder that should be there, at least from my experience, but my data still will not come back up. SOMEONE PLEASE TELL ME THIS IS FIXABLE!!!!!!!!!!!!! I'm losing my mind, considering this is my only work phone for my business, and as of yet, i don't have enough income from this business to buy a new phone.
EDIT*****
Before I forget, which I already did once, I have tried the following steps to fix this:
1: Bought a new sim card tray through ebay - no change
2: Flashed back to stock ROM - (multiple times) no change
3: Flashed multiple older roms - no change
4: Ran the EFSFix off of this: http://forum.xda-developers.com/showthread.php?t=1611796
Currently looking at performing a dark side wipe to install a new custom rom, but not sure if this will work yet or not.

420tuprophit13 said:
ok so here's the deal folks. I've been trying to fix this problem on my ATT Skyrocke since the 21st. I had flashed a copy of the Liquid Smooth ROM with all data working. Bear in mind, this S2 is net unlocked and APN settings are changeable with my sim card in, and everything is set to Straight Talk APN settings. When LS ROM was installed, everything worked fine, til this fateful day of the 21st where everything just stopped... No network, no data, no nothing. Every once in a while my network shows up and allows me to make short phone calls ranging from 45 seconds to 10 minutes, and sms/mms are even more widely spread on being able to receive. After going through my EFS folder, it seems that the phone is missing a critical file named nv_data. I have everything else in the EFS folder that should be there, at least from my experience, but my data still will not come back up. SOMEONE PLEASE TELL ME THIS IS FIXABLE!!!!!!!!!!!!! I'm losing my mind, considering this is my only work phone for my business, and as of yet, i don't have enough income from this business to buy a new phone.
EDIT*****
Before I forget, which I already did once, I have tried the following steps to fix this:
1: Bought a new sim card tray through ebay - no change
2: Flashed back to stock ROM - (multiple times) no change
3: Flashed multiple older roms - no change
4: Ran the EFSFix off of this: http://forum.xda-developers.com/showthread.php?t=1611796
Currently looking at performing a dark side wipe to install a new custom rom, but not sure if this will work yet or not.
Click to expand...
Click to collapse
goto READ THIS B4 POSTING | THE MOST Common Questions Answered HERE read/do q)25.d and borrow someones active att sim card, if after that phone still doesnt work right then its some kind of hw failure

hey vin. actually i had tried that thread and instructions for such already. although i went ahead and did it again in hopes that maybe i just did it wrong, but no change.
Here's a little update:
The baseband is known, running on I727UCMC1 baseband, but the IMEI number shows up as 0/00. I spent the entire night searching the forums here and over at androidforums.com and ran through google. There's no listing of the baseband being known, but the imei number being corrupt. Maybe I'm just using the wrong keywords... IDK but I do know this is really strange. I've never ran into this issue before.
So anyone know why the Baseband would be known, but the IMEI corrupt?

420tuprophit13 said:
hey vin. actually i had tried that thread and instructions for such already. although i went ahead and did it again in hopes that maybe i just did it wrong, but no change.
Here's a little update:
The baseband is known, running on I727UCMC1 baseband, but the IMEI number shows up as 0/00. I spent the entire night searching the forums here and over at androidforums.com and ran through google. There's no listing of the baseband being known, but the imei number being corrupt. Maybe I'm just using the wrong keywords... IDK but I do know this is really strange. I've never ran into this issue before.
So anyone know why the Baseband would be known, but the IMEI corrupt?
Click to expand...
Click to collapse
baseband aka radio has nothing todo w/the imei.
as to why imei got corrupted, idk why it happened and i dont know if theres a fix for that
edit: a bad radio might corrupt the efs folder though not sure if thats what happened to u
it seems you might have a corrupted efs folder
search for corrupted imei
try this http://forum.xda-developers.com/showthread.php?t=1611796