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[Q] Invalid IMEI after installing ROM

Hello guys,
I just installed 4.1.2 Android from 4.2.2 and now My phone can't read my SIM card. When I'm trying to unlock my phone with GalaxSim Unlock it says "Warning: invalid IMEI. Restoring an EFS backup before unlocking is advised." The IMEI code on *#06# and on my phone's box are different. I have no ideas what I can do because I have never had this problem before after ROM installing. How I can solve this problem?

did you backup you umei/efs before at ant time?
Cruzin' tha Galaxy SIII via Obsessed Rom / "INAPPROPRIATE" Kernel

bbolton_98 said:
did you backup you umei/efs before at ant time?
Cruzin' tha Galaxy SIII via Obsessed Rom / "INAPPROPRIATE" Kernel
Click to expand...
Click to collapse
No I did not. Is there an other way to solve it?

check out below thread. hope you'd get it back!
http://forum.xda-developers.com/showthread.php?t=1852255

thats the best way (link in above post) if you happen to of installed synergy rom at any time it would have asked about making one for you. also nandroid manager can backup it also so check and see if any of your nandroids have a efs partition saved. if not read post in link more than once before doing anything.
Cruzin' tha Galaxy SIII via Obsessed Rom / "INAPPROPRIATE" Kernel

Is terminal emulator download available in Google play store??

bbolton_98 said:
thats the best way (link in above post) if you happen to of installed synergy rom at any time it would have asked about making one for you. also nandroid manager can backup it also so check and see if any of your nandroids have a efs partition saved. if not read post in link more than once before doing anything.
Cruzin' tha Galaxy SIII via Obsessed Rom / "INAPPROPRIATE" Kernel
Click to expand...
Click to collapse
I followed all steps but there is some problem in Restore. My phone is rooted and I have Terminal Emulator. When I write "su reboot nvbackup' it works and my phone reboot. But when I write "adb reboot nv restore" it says "device not found". Could you help me? I cannot reply on that thread.
http: //i39.tinypic.com/x513yc.png
Delete the space in this link because I cannot post any links until I do not have 10 post.

Edvinas1602 said:
I followed all steps but there is some problem in Restore. My phone is rooted and I have Terminal Emulator. When I write "su reboot nvbackup' it works and my phone reboot. But when I write "adb reboot nv restore" it says "device not found". Could you help me? I cannot reply on that thread.
http: //i39.tinypic.com/x513yc.png
Delete the space in this link because I cannot post any links until I do not have 10 post.
Click to expand...
Click to collapse
You need to reread the directions in the Comprehensive IMEI thread. You'll see why it's failing. I will say this though, "adb" is primarily a computer command so it's unnecessary on mobile.
Sent from my SCH-I535 using Tapatalk 4

I still do not get this. It says that I do not need ADB if I have Terminal Emulator and my phone is rooted. I just need to restore it in a some way.

Edvinas1602 said:
I still do not get this. It says that I do not need ADB if I have Terminal Emulator and my phone is rooted. I just need to restore it in a some way.
Click to expand...
Click to collapse
I'll ask you this now before I explain to you the command, does your IMEI in Settings/About Phone match what's on your Verizon GSIII retail box? Cuz restoring your IMEI will not work right now if its the wrong one. What you just backed up could be the "broken" IMEI and restoring it will do you more harm than good.
twistedillutions said:
Is terminal emulator download available in Google play store??
Click to expand...
Click to collapse
For clarity purposes, yes. Although, I see you posted this question in the Comprehensive IMEI thread and received an answer there as well.

SlimSnoopOS said:
I'll ask you this now before I explain to you the command, does your IMEI in Settings/About Phone match what's on your Verizon GSIII retail box? Cuz restoring your IMEI will not work right now if its the wrong one. What you just backed up could be the "broken" IMEI and restoring it will do you more harm than good.
Click to expand...
Click to collapse
IMEI codes are different. Now the IMEI code is 004999010640000. On my box the IMEI code is very different that one.

Edvinas1602 said:
IMEI codes are different. Now the IMEI code is 004999010640000. On my box the IMEI code is very different that one.
Click to expand...
Click to collapse
Aight, second question. Are you absolutely sure that you have a Verizon Galaxy SIII (d2vzw aka SCH-i535)? If so, proceed to read.
if you just performed this IMEI backup with the improper IMEI then the restore command will only reinsert this same wrong IMEI. You want your "proper" IMEI which is on the box to be backed up before you ever attempt an IMEI restore. If you have a CWM or TWRP rom backup then you should try restoring that THEN check if your IMEI is correct or wrong.
Do not post your proper IMEI. If it returns if/when you restore your rom in CWM or TWRP then just say "my IMEI is correct" or something like that. If you don't have a CWM or TWRP backup or don't know what I'm talking about then you're going to need a Windows computer and you'll need to Odin flash stock VRALF1 or VRAGL1 firmware tar. Make sure to unzip the file before using Odin, Odin flashes "tar" and "tar.md5" files only. If your IMEI is not restored at that point, then you'll need to reprovision your LTE sim card with the following code. It will erase your phone's storage. The dialer code only works o ICS software (so you'll need absolutely need VRALF2 or VRALG1):
Open the dialer and enter *2767*3855#
I'm stepping out for an hour or so. If you have any questions, hopefully someone else can provide input. If someone else things what I wrote above is unnecessary, please say so.
Edit: For clarity as well, I do not know if the VRALF2 or VRALG1 tar files format your internal storage (let's reasonably assume they do wipe /sdcard), so backup whatever important data you have on the phone to your computer or external sdcard.

Actually I have got SGS3 i9300. When I created this thread I didn't see that here is a subforum for i9300. Thanks for the help I will try it and let you know.

SlimSnoopOS said:
I'll ask you this now before I explain to you the command, does your IMEI in Settings/About Phone match what's on your Verizon GSIII retail box? Cuz restoring your IMEI will not work right now if its the wrong one. What you just backed up could be the "broken" IMEI and restoring it will do you more harm than good.
For clarity purposes, yes. Although, I see you posted this question in the Comprehensive IMEI thread and received an answer there as well.
Click to expand...
Click to collapse
Yes i posted both places up late last night ill stay over there for answers thnz for the response

SlimSnoopOS said:
Aight, second question. Are you absolutely sure that you have a Verizon Galaxy SIII (d2vzw aka SCH-i535)? If so, proceed to read.
if you just performed this IMEI backup with the improper IMEI then the restore command will only reinsert this same wrong IMEI. You want your "proper" IMEI which is on the box to be backed up before you ever attempt an IMEI restore. If you have a CWM or TWRP rom backup then you should try restoring that THEN check if your IMEI is correct or wrong.
Do not post your proper IMEI. If it returns if/when you restore your rom in CWM or TWRP then just say "my IMEI is correct" or something like that. If you don't have a CWM or TWRP backup or don't know what I'm talking about then you're going to need a Windows computer and you'll need to Odin flash stock VRALF1 or VRAGL1 firmware tar. Make sure to unzip the file before using Odin, Odin flashes "tar" and "tar.md5" files only. If your IMEI is not restored at that point, then you'll need to reprovision your LTE sim card with the following code. It will erase your phone's storage. The dialer code only works o ICS software (so you'll need absolutely need VRALF2 or VRALG1):
Open the dialer and enter *2767*3855#
I'm stepping out for an hour or so. If you have any questions, hopefully someone else can provide input. If someone else things what I wrote above is unnecessary, please say so.
Edit: For clarity as well, I do not know if the VRALF2 or VRALG1 tar files format your internal storage (let's reasonably assume they do wipe /sdcard), so backup whatever important data you have on the phone to your computer or external sdcard.
Click to expand...
Click to collapse
I'm actually considering doing this today. I lost my IMEI/ERI and restored them with the forbidden software but the problem I'm having is on some roms my google play store won't connect and it's been kinda frustrating and I don't know what else do, I've cleared store cache and data, plus every other fix I could find online. Plus it might be good practice for me if I have to send my phone back in the future as I bought my S3 rooted and unlocked.

TheAfroSamurai said:
I'm actually considering doing this today. I lost my IMEI/ERI and restored them with the forbidden software but the problem I'm having is on some roms my google play store won't connect and it's been kinda frustrating and I don't know what else do, I've cleared store cache and data, plus every other fix I could find online. Plus it might be good practice for me if I have to send my phone back in the future as I bought my S3 rooted and unlocked.
Click to expand...
Click to collapse
Might as well give it a try, not much at risk you know?

SlimSnoopOS said:
Might as well give it a try, not much at risk you know?
Click to expand...
Click to collapse
The only thing I can chalk it up to is maybe there was something still wonky because I didn't Odin back and used the Repair Tool. I'm off today and not really interested in the football game tonight so I got time. I'll Odin back, reprovision and reroot, unlock and see what happens with play store after that, thanks for all your help. Learned alot from your posts dude...:good:

TheAfroSamurai said:
I'm actually considering doing this today. I lost my IMEI/ERI and restored them with the forbidden software but the problem I'm having is on some roms my google play store won't connect and it's been kinda frustrating and I don't know what else do, I've cleared store cache and data, plus every other fix I could find online. Plus it might be good practice for me if I have to send my phone back in the future as I bought my S3 rooted and unlocked.
Click to expand...
Click to collapse
How did you restore your IMEI? What software did you use?

Edvinas1602 said:
How did you restore your IMEI? What software did you use?
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Click to collapse
This was before I found the Samsung Repair Utility so you may not need QPST and you can just use the repair utility.
1) I restored my IMEI using this guide here: http://droidmodderx.com/galaxys3/?page_id=79
2) Please note that since I hadn't found the repair utility you may not need to do step one, the repair utility does both IMEI/ERI
3) Go here: http://forum.xda-developers.com/showpost.php?p=44871571&postcount=3
4) We don't want to get XDA in trouble so I can't link the repair utility or have a mirror for it. I can only put you on the block and you have to find the house....
5) Once everything is ok flash your modem back up to whatever current modem you were using.
6) Also it may be best to just Odin back as I'm having issues with Play Store on certain roms.

TheAfroSamurai said:
This was before I found the Samsung Repair Utility so you may not need QPST and you can just use the repair utility.
1) I restored my IMEI using this guide here: http://droidmodderx.com/galaxys3/?page_id=79
2) Please note that since I hadn't found the repair utility you may not need to do step one, the repair utility does both IMEI/ERI
3) Go here: http://forum.xda-developers.com/showpost.php?p=44871571&postcount=3
4) We don't want to get XDA in trouble so I can't link the repair utility or have a mirror for it. I can only put you on the block and you have to find the house....
5) Once everything is ok flash your modem back up to whatever current modem you were using.
6) Also it may be best to just Odin back as I'm having issues with Play Store on certain roms.
Click to expand...
Click to collapse
What is the version of your Android? When I write *#7284# I don't see something like "Qualcomm USB Settings"

No EFS Backup...IMEI Lost D821 :(

After multiple flashing of ROMs and kernels, suddenly my baseband has gone (Unknown) and IMEI too . After reading multiple forums, I figured out that it might be a corrupted EFS and my phone is not under warranty everything works fine...wifi, bluetooth etc...only no cellular signal...please help guys already flashed factory images (KK and Lollipop) and tried few custom roms....but same problem Was on latest optipop with Code blue r793 :crying:
Thanks in Advance

Fastboot flash stock cache.img usually fixes this. Not seen many EFS issues on nexus 5. Mainly Samsung has this problem

rootSU said:
Fastboot flash stock cache.img usually fixes this. Not seen many EFS issues on nexus 5. Mainly Samsung has this problem
Click to expand...
Click to collapse
Thanks for the reply but it did not work mate flashed entire stock rom by method 1 and 2 and also flashed cache.img seperately

rootSU said:
Fastboot flash stock cache.img usually fixes this. Not seen many EFS issues on nexus 5. Mainly Samsung has this problem
Click to expand...
Click to collapse
Please help friend, went to Lg Service Center and they say motherboard needs to be changed...about $230 ...tried flashing many custom roms, stock KK and Lollipop latest versions...I backed up my modemst1 and modemst2 and flashed a friend's EFS...the situation improved...baseband shows correctly but IMEI 0 and no cellular network though signal is there....I can see the signal bar full and also E for EDGe written but whn I try to call, no network. When I reflash my EFS files, it is back to unknown IMEI and baseband Please help mate as I see you are very much experienced in this...Thanks a ton in advance
No offence but can also donate you some $$s for your cause....

Try using this

rajvernekar said:
Please help friend, went to Lg Service Center and they say motherboard needs to be changed...about $230 ...tried flashing many custom roms, stock KK and Lollipop latest versions...I backed up my modemst1 and modemst2 and flashed a friend's EFS...the situation improved...baseband shows correctly but IMEI 0 and no cellular network though signal is there....I can see the signal bar full and also E for EDGe written but whn I try to call, no network. When I reflash my EFS files, it is back to unknown IMEI and baseband Please help mate as I see you are very much experienced in this...Thanks a ton in advance
No offence but can also donate you some $$s for your cause....
Click to expand...
Click to collapse
Afraid not mate . Messing with the EFS is illegal in some countries - and there's not much we can do anyway. The only ones who can help you are the guys at LG - keep pestering them until they agree to rewrite your efs.

Why did you not flash your own number. It's on the box and inside the back cover of the phone. To use a friends is stupid and illegal. You can't have two phones with the same number. It's highly illegal.

2G Only
Well, Managed to get back my IMEI as one of the local repair guys injected it...donno how bust maybe using Octoplus Box....But now stuck with 2G only as if I try to switch to 3G/4G, it does not work and phone reboots. Tried multiple roms, LG Flash tool...no resort....any help wud be highly appreciated

RajRockyBalboa said:
Well, Managed to get back my IMEI as one of the local repair guys injected it...donno how bust maybe using Octoplus Box....But now stuck with 2G only as if I try to switch to 3G/4G, it does not work and phone reboots. Tried multiple roms, LG Flash tool...no resort....any help wud be highly appreciated
Click to expand...
Click to collapse
Bring it back to the repair shop. To riffbox it he would of had to solder some stuff to make it work. I'd bet that solder got somewhere it's not supposed to.

theesotericone said:
Bring it back to the repair shop. To riffbox it he would of had to solder some stuff to make it work. I'd bet that solder got somewhere it's not supposed to.
Click to expand...
Click to collapse
The Local Guy did not open the phone....he did some software only changes...

RajRockyBalboa said:
The Local Guy did not open the phone....he did some software only changes...
Click to expand...
Click to collapse
Interesting. He just used an IMEI switcher app then? Check and make sure your APNs are correct. That could cause loss of 4g but shouldn't ever cause the phone to reboot.

theesotericone said:
Interesting. He just used an IMEI switcher app then? Check and make sure your APNs are correct. That could cause loss of 4g but shouldn't ever cause the phone to reboot.
Click to expand...
Click to collapse
I checked my APNs and am using the same ones I had earlier. Reboot does not happen if I fix my connection to 2g...anyways, I read on XDA that flashing back my QCN file of any other D821 using QPST might solve this..I also have a file which this person shared. (QCN does not hold IMEI info but only NV backup). Can someone guide me whether this will work and if yes, how do I do it?

RajRockyBalboa said:
I checked my APNs and am using the same ones I had earlier. Reboot does not happen if I fix my connection to 2g...anyways, I read on XDA that flashing back my QCN file of any other D821 using QPST might solve this..I also have a file which this person shared. (QCN does not hold IMEI info but only NV backup). Can someone guide me whether this will work and if yes, how do I do it?[/QUOTE
You may have to use the tools capable of flashing stuff to swap CDMA carriers to get AA passwords n stuff back. And its illegal to swap ESN/imei in some countries but i don't see harm in repairing what u broke as long as info is original to Device
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse

Tampering with the imei is illegal

dicecuber said:
Tampering with the imei is illegal
Click to expand...
Click to collapse
You sure like saying that.
(d) Exception- Subsection (b) shall not apply to the manufacturer of a mobile device or a person who repairs or refurbishes a mobile device unless the manufacturer or person knows that the mobile device or part involved is stolen.'.
Click to expand...
Click to collapse
From here:
http://thomas.loc.gov/cgi-bin/query/z?c112:S.3186.IS:
That bill didn't pass but one like it did. I can't find it right now but you get the idea. FCC regs also allow for REPAIRING of it.
XDA however won't really allow any talk of how to do that because in some countries it is illegal. Plus they gotta cover their arse. So I'll just leave it it that.

No tampering with IMEI here
Thanks for the replies. But I am at all not wanting to tamper with my Imei.. Infact the imei is stable and fixed... I just want my 3g back... Rest of the phone is working perfectly fine

Need modem backup for 6045Y. Help needed.

Hi,
I tested the chinese rom yesterday on my 6045Y and it resulted in a loss of GSM signal, even after rsstoring the phone with mobile Q upgrade software.
I would need someone's help here.
Can people use @DallasCZ backup-all.bat script and extract the original partitions of their phone to share with me?
I need at least to try to get the modem to it's original state.
Again, it's for 6045Y.
Thanks all for your help.
Sent from my GT-I9000 using XDA Free mobile app

Anghirrim said:
Hi,
I tested the chinese rom yesterday on my 6045Y and it resulted in a loss of GSM signal, even after rsstoring the phone with mobile Q upgrade software.
I would need someone's help here.
Can people use @DallasCZ backup-all.bat script and extract the original partitions of their phone to share with me?
I need at least to try to get the modem to it's original state.
Again, it's for 6045Y.
Thanks all for your help.
Sent from my GT-I9000 using XDA Free mobile app
Click to expand...
Click to collapse
Any chance the radio to be turned off ? Dial *#*#4636#*#* and look at the phone info. Almost at the end of the page there is a button turn radio off/on. There is also an option to select the radio band under the three dots menu from there.

petrov.0 said:
Any chance the radio to be turned off ? Dial *#*#4636#*#* and look at the phone info. Almost at the end of the page there is a button turn radio off/on. There is also an option to select the radio band under the three dots menu from there.
Click to expand...
Click to collapse
Already checked that. Radio is on and bands are well selected.
I found a thread for similar issue when googling the first line of my logcat. It's on XDA forum as well, CM12.1 development for the oneplus one. They lost connection as well.
Sent from my 6045Y using XDA Free mobile app

Anghirrim said:
Already checked that. Radio is on and bands are well selected.
I found a thread for similar issue when googling the first line of my logcat. It's on XDA forum as well, CM12.1 development for the oneplus one. They lost connection as well.
Sent from my 6045Y using XDA Free mobile app
Click to expand...
Click to collapse
so found any solution for the problem ?

i made it dozen times on google nexus s and zte v9180 it was allways about to flash the radio file (modem, or NON-HLOS.img) , but now we heve to flash the NON-HLOS.img but since w edont have it there is maybe only way to push the modem file trough adb command (the reverse way i extracted it). But since we dont know what files are needed also it can work or not.
There were some guys from htcmania.com from spain I think. They made one build of 5.0.2 for 6045Y .. they should have the right modem files (if they have it in the rom). but unfotunatelly they removed the links because of some bugs (not modem related). There is a thread in development section. Contact the OP and ask for the link to the rom.

yash_rathore25 said:
so found any solution for the problem ?
Click to expand...
Click to collapse
Nope, they did not care that much as they had original ROM's to flash and solve the issue...
@DallasCZ:
You're talking about this thread?
http://www.htcmania.com/showthread.php?t=1045981
http://forum.xda-developers.com/idol-3/development/rom-arde-dev-team-v1-5-0-2-idol3-stock-t3167082
I've just sent a mail to franq36. We'll see.

Found the link back guy's!!!!! Downloading.
https://mega.nz/#!QBpgXKja!Z-_IAMlMDAsU5eQx6hwSxoSlZl_ZLePytE0qqXR6vOU
Found here:
http://forum.frandroid.com/topic/224636-rom-arde-dev-team/

And these informations don't hurt...
MD5 : f114a0a048f9bfac2d9b92582bc6d058
ZIP size : 1.11GO
Version : V1
Développeurs Rom: Acura2201, josepica481, franq36

Just an idea ... the updater script from the ported rom resets the modemst1 and modemst2 partitions. Try to reset them by the same way (prepare an updater-script for this) after flashing the backup of the modem.img from @DallasCZ. Also reflash the fsg partition ... ask @DallasCZ to make backup of it ... the current baseband version is definitely stored there, and somehow controls the modem ... and let's hope that will boot afterwards ...

@petrov.0:
You suggest not flashing the rom?
I don't know anything about development. I'm just a Linux user who learned to read before asking... So I can't do any updater-script.

I tried to flash the rom with "partial" success. Something has been flashed, but it was super fast. No specific thing shown in verbose mode in TWRP.
Just a warning before flashing:
E:Invalid block device on `/sdcard ext4 [][][]flags=display="Internal SD" ; symlink
', 'flags=display="Internal SD" ; symlink' , 27
Then regular flash. But on the french forum where I found the link, all the comments were... first boot super long as it has to install things, etc...
What am I missing here?

Anghirrim said:
@petrov.0:
You suggest not flashing the rom?
I don't know anything about development. I'm just a Linux user who learned to read before asking... So I can't do any updater-script.
Click to expand...
Click to collapse
Which ROM the Andre Dev ? Flash whatever you want its a trial and error process already ... At least the Mobile Upgrade Q can recover the phone now ... or at least for now ... I'm also a Linux user ... read the content of these partitions (or at least the human readable part). You have the necessary tools to do this from your Linux box.
---------- Post added at 23:08 ---------- Previous post was at 22:57 ----------
Anghirrim said:
I tried to flash the rom with "partial" success. Something has been flashed, but it was super fast. No specific thing shown in verbose mode in TWRP.
Just a warning before flashing:
E:Invalid block device on `/sdcard ext4 [][][]flags=display="Internal SD" ; symlink
', 'flags=display="Internal SD" ; symlink' , 27
Then regular flash. But on the french forum where I found the link, all the comments were... first boot super long as it has to install things, etc...
What am I missing here?
Click to expand...
Click to collapse
This message is there from the boot of the recovery. The reason for the "super fast flash" is somewhere else. Check the recovery.log under /tmp/

petrov.0 said:
This message is there from the boot of the recovery. The reason for the "super fast flash" is somewhere else. Check the recovery.log under /tmp/
Click to expand...
Click to collapse
OK, I'll try to reflash but I just extracted the rom and looked the updater-script. It just udpate files in /system and flashes boot.img.
Nothing about modem or anything else.

Anghirrim said:
OK, I'll try to reflash but I just extracted the rom and looked the updater-script. It just udpate files in /system and flashes boot.img.
Nothing about modem or anything else.
Click to expand...
Click to collapse
That updater script only does system and boot...they've already cleaned it similar to how I did. I can give you a copy of the USA modem if you want to try that one...it's the largest of all of them so far. I would not have installed the arde rom...they pulled it due to issues.
Here's the 6045i usa modem. You will have to unzip it first before flashing via fastboot.
http://www38.zippyshare.com/v/kielTvJd/file.html

OK I'll try. Thanks!
Still:
fastboot -i 0x1bbb flash modem yourmodem.img?

Anghirrim said:
OK I'll try. Thanks!
Still:
fastboot -i 0x1bbb flash modem yourmodem.img?
Click to expand...
Click to collapse
Yep...after unzipping...and I think my image is just called "modem" after you unzip it so it'll be fastboot -i 0x1bbb flash modem modem which is gonna look weird.

@franq36 (the Arde rom developer) is willg to help me and send all partitions if needed.
He posted me a 64Mo 6045Y modem file. I'll try to flash it first. By the way, he told me that modem = NON-HLOS. Is that correct or are they different files?
Thanks all.
Edit: Now, using again Mobile Upgrade Q to get back to a clean situation as the short flash of Arde rom lead to FC's for various apps.

Spanish modem 64Mo img flashed. No success getting signal back.
I'll have to flash partition by partition....
Is it still worth flashing your Modem @famewolf?
Thanks,

Anghirrim said:
Spanish modem 64Mo img flashed. No success getting signal back.
I'll have to flash partition by partition....
Is it still worth flashing your Modem @famewolf?
Thanks,
Click to expand...
Click to collapse
I'd say yes but that's your call...you'll be overwriting it all anyway if it doesn't work with the other french phones partitions.

famewolf said:
I'd say yes but that's your call...you'll be overwriting it all anyway if it doesn't work with the other french phones partitions.
Click to expand...
Click to collapse
So... I think I'll try it a bit later.
If we go step by step, with what I did already:
- Restored the phone /system and boot.img with my backup through TWRP ==> Everything here should be back to normal
- Restored several times with Mobile Upgrade Q ==> Back to an "even more" normal state
- Flashed a spanish modem image 64Mo big ==> This is the largest modem found.
After all of this, I still have no signal back. I'll try to focus on other things changed by the updater-script from the Chinese rom and restore impacted partitions.
If still fails, then I'll try the US modem.

IMEI=0 restore with QPST, provided a QCN is available?

First things first, I'm sorry for opening another thread on this but I feel the other ones weren't headed exactly in the correct direction.
A little background:
I was trying to downgrade my XT1541 to Lollipop since 6.0 was really bad and I got frustrated and used
Code:
fastboot erase all
The result was I erased my IMEI and I haven't been able to connect to a network carrier since. The problem can be solved by re-writing my IMEI but that's the difficult part.
What I gathered so far is I can use QPST, backup QCN, go into HEX and change IMEI there, then restore the QCN back to my device. The problem is I can't locate the IMEI in my QCN since my IMEI is now simply 0.
So in all, could someone make a backup of THEIR QCN and send it to me? I would flash it to my XT1541, locate the IMEI (since now I would know what I'm looking for), then change it back to my own.
Does that sound like something that could work? Can anyone help?
UPDATE1: Noone sent me their QCN however I did try to restore the one I backup up (which still has an IMEI=0). QPST Software Download reports
Received an invalid command from the phone.
Click to expand...
Click to collapse
I tried using Qualcomm NV Tools (from EFS Professional), which reads all the information correctly, however when attempting to write the following appears
Cannot Write: NV_UE_IMEI_I
Error: NV_ERR_BAD_SECURITY_STATE
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Click to collapse
So getting another QCN won't help as it seems that I can't write the IMEI (qcn) back to the device...

There are only two possibilities of fixing this... a 50/50 chance that a full factory flash will restore it (don't know how, but it does sometimes). If that doesn't work, then you need to send it to Moto for repair.

acejavelin said:
There are only two possibilities of fixing this... a 50/50 chance that a full factory flash will restore it (don't know how, but it does sometimes). If that doesn't work, then you need to send it to Moto for repair.
Click to expand...
Click to collapse
I have already tried with a full stock rom flash which didnt work...

zeusalmighty said:
I have already tried with a full stock rom flash which didnt work...
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Well, unfortunately that leaves option 2... or turn it into a media play and buy a new phone.
Funny how `fastboot erase all` causes such a pain for some and not others... but once your IMEI is gone, there isn't much you can do. Moto kinda screwed the pooch on that one.

Hello, did u try Xposed IMEI changer? Maybe that will be a native fix for this issue.

Try this >http://forum.xda-developers.com/moto-g/help/info-moto-g-imei0-t2925970/post61725547#post61725547

Henriquefeira said:
Try this >http://forum.xda-developers.com/moto-g/help/info-moto-g-imei0-t2925970/post61725547#post61725547
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Thanks but the dd commands wont work since it appears the folder structure is different on the XT1541...any help?

Forever Alone said:
Hello, did u try Xposed IMEI changer? Maybe that will be a native fix for this issue.
Click to expand...
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Hey, couldn't get any results with the xposed module

Just one bump

One last effort, not a bump. If anyone can direct me to commercial services for repairing the IMEI i'd be very greatful. Official Motorola Service wont repair it for me btw.
Thanks

try this guys
http://forum.xda-developers.com/2015-moto-g/help/tuto-fastboot-erase-signal-t3451362#post68445534

SIM Card not working after Flashing Official Stock ROM(Read below for important note!)

Actually I bricked my device and I was trying to flash the stock ROM again using SP Flash tool. Unfortunately while flashing it shows sec_aut_mismatch ( or something like this) for the file called cust.img in the stock rom and says please disable verified boot. What I did now is "why don't I try letting it go?" I unchecked it. I flashed rom without this file. it got flashed, works fine everything except SIM Cards. The phone detects sim cards but no signal. SIm cards are fine Physically. Do you believe that this not flashing cust.img could be a cause?
MAIN THING: Flashed Stock Rom without CUST.IMG
Secondly I tried to flash the cust.img using fastboot now, but still no luck. I don't know what this file does. PLEASE HELP ME. I AM IN TROUBLE

That's most likely an EFS problem. Do you have some backup?

dedq said:
That's most likely an EFS problem. Do you have some backup?
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I have a little backup taken through twrp. But it has only some files starting with boot, bootloader and recovery. Total 9 files. Can you explain more about EFS please?

mottaM said:
Actually I bricked my device and I was trying to flash the stock ROM again using SP Flash tool. Unfortunately while flashing it shows sec_aut_mismatch ( or something like this) for the file called cust.img in the stock rom and says please disable verified boot. What I did now is "why don't I try letting it go?" I unchecked it. I flashed rom without this file. it got flashed, works fine everything except SIM Cards. The phone detects sim cards but no signal. SIm cards are fine Physically. Do you believe that this not flashing cust.img could be a cause?
MAIN THING: Flashed Stock Rom without CUST.IMG
Secondly I tried to flash the cust.img using fastboot now, but still no luck. I don't know what this file does. PLEASE HELP ME. I AM IN TROUBLE
Click to expand...
Click to collapse
A thing I forgot is that cust.img flash is successful in fastboot mode

mottaM said:
I have a little backup taken through twrp. But it has only some files starting with boot, bootloader and recovery. Total 9 files. Can you explain more about EFS please?
Click to expand...
Click to collapse
EFS is something responsible for your IMEI which is connected to the signal and SIM.
You cannot have phone signal if you don't have IMEI number which you could have lost. Can you check if you have IMEI? If not, the problem is probably in modem and I would be happy if you had backed that up.

dedq said:
EFS is something responsible for your IMEI which is connected to the signal and SIM.
You cannot have phone signal if you don't have IMEI number which you could have lost. Can you check if you have IMEI? If not, the problem is probably in modem and I would be happy if you had backed that up.
Click to expand...
Click to collapse
I don't see any IMEI numbers. A little research tells me that I must have nvdata.bin and nvram.img in the backup. If this is correct then I don't have such a backup. Is there any way to fix it up without backup?

dedq said:
EFS is something responsible for your IMEI which is connected to the signal and SIM.
You cannot have phone signal if you don't have IMEI number which you could have lost. Can you check if you have IMEI? If not, the problem is probably in modem and I would be happy if you had backed that up.
Click to expand...
Click to collapse
One more thing I notice is that when I enter Recovery mode, It says "nvdata corrupt" in red. More information you may want to know is:
My device is redmi 6a
Wifi works fine
Baseband version present
When I insert sim cards, it detects them(icons get updated on the notification area) it also says getting sim info.
When I enter phone information, it says signal strength in those numbers when sim is inserted
I believe that hardware is fine thus. I really regret my step of trying to change OS. I just want to get sim working somehow

mottaM said:
I don't see any IMEI numbers. A little research tells me that I must have nvdata.bin and nvram.img in the backup. If this is correct then I don't have such a backup. Is there any way to fix it up without backup?
Click to expand...
Click to collapse
I have never had that kind of problem and only had problems with EFS.
I think flashing stock ROM would fix your problem. I don't know what else could be.

mottaM said:
Actually I bricked my device and I was trying to flash the stock ROM again using SP Flash tool. Unfortunately while flashing it shows sec_aut_mismatch ( or something like this) for the file called cust.img in the stock rom and says please disable verified boot. What I did now is "why don't I try letting it go?" I unchecked it. I flashed rom without this file. it got flashed, works fine everything except SIM Cards. The phone detects sim cards but no signal. SIm cards are fine Physically. Do you believe that this not flashing cust.img could be a cause?
MAIN THING: Flashed Stock Rom without CUST.IMG
Secondly I tried to flash the cust.img using fastboot now, but still no luck. I don't know what this file does. PLEASE HELP ME. I AM IN TROUBLE
Click to expand...
Click to collapse
You should know that EFS ( NVRAM ) is a partition on your Android device that stores all the important data associated with your phone. For instance, these data include the IMEI number, Mac address of Wireless devices, important files of internet and product code, etc. Moreover, this data is so important that without this, you would not be able to use your Android phone. And it is very important to keep this partition safe and backed up in case things go south.
My guess is because you were flashing custom ROMs and/or modded apps that you have lost this important EFS ( NVRAM ) partition on the device.