I purchased a Tmobile Samsung Galaxy Tab 7 on ebay. It has CyanogenMod version 10.1-20130827 istalled with phone capabilities. I did insert my sim card and had the message IMEI is invalid. Am unable to get any network. Can anyone please help me as to how to go around around this IMEI error message. Thank you
restock. Your EFS partition is likely corrupted.
In theory, flashing stock ROM should get your EFS back.
If so, then backup the /EFS content, and you can upgrade to CM10.1 again.
If the IMEI is still bad at that point, you can manually restore the EFS using your backup copy.
Thank you for the response. Can you please direct me or provide a link as to how I can flash the stock rom. Am very fresh on such matters. Thanks once again.
Sent from my GT-N8013 using XDA Premium 4 mobile app
you didn't see my signature?
priyana said:
you didn't see my signature?
Click to expand...
Click to collapse
Unfortunately, have the same problem. No efs backup. Tried all kinds of stock roms including Overcome. No joy. Is there any way to inject the IMEI into the machine?
Related
Guys,
I just updated with the CM10 nightly and I am getting a prompt on bootup that my IMEI is not valid. The IMEI is not blank, and isnt something like 0123456789. Is this a big issue? My calling and texting are working fine, as is my mobile data.
Thanks
The same happens to me. I did an efs backup with root manager but is there any risk? Could someone explain please?
I backed up with cwm before loading cm10 0823. And did an imei restore from Nitrality and it says successful. However I still get an invalid imei on bootup
Sent from my GT-I9000 using xda premium
Updated to cm10 0824. Same issue. Should I do a full cwm restore?
Sent from my GT-I9000 using xda premium
Hey guys common issue if you want it back follow my guide http://forum.xda-developers.com/showthread.php?t=1845104 you might want to titanium backup your apps first then backup your sd
Sent from my GT-I9000 using xda premium
Restored cwm backup from before the issue started. No long have invalid imei. Update to latest cm 10 and invalid imei prompt on startup. However the imei screen under About has an imei number in it still.
Sent from my GT-I9000 using xda premium
Correct imei though as in the same as the one under the battery?
Sent from my GT-I9000 using xda premium
Nope. Its a different one.
Sent from my GT-I9000 using xda premium
webchaos said:
Nope. Its a different one.
Sent from my GT-I9000 using xda premium
Click to expand...
Click to collapse
OK so its invalid try the link I previously posted if it works or not get back to me
Sent from my GT-I9000 using xda premium
After going back to stock GB, darky resurrection ROM, cm9 and finally cm10. IMEI is back and looking OK. Thanks.
Sent from my GT-I9000 using xda premium
That's good
Sent from my GT-I9000 using xda premium
Felt a bit of nostalgia going back through the last 2 years of ROMs lol. Thanks again.
Sent from my GT-I9000 using xda premium
webchaos said:
Felt a bit of nostalgia going back through the last 2 years of ROMs lol. Thanks again.
Sent from my GT-I9000 using xda premium
Click to expand...
Click to collapse
Well, in my case, my father's phone lost all efs backups, and nv_data.bin is corrupted (regenerated new one with default generic IMEI).
So, there is nothing to restore from. Reflashing to stock 2.3.6 JW5 firmware didn't help. So you think that I will have to reflash to 2.2.1? How so? I don't understand how older firmware may help restoring correct IMEI...and I don't own JTAG, z3w or SPT boxes...
And for morrons - no, there is no .nv_data.bin, no nv_data.bin.bak, or similiar...only new nv_data.bin(md5) with default, generic IMEI.
Is there any way to restore it? if somebody start to complain that I am thief, I can prove by photos of original phone box, and buying papers I have (my father gave them to me for this purpose).
And no, I don't have to steal anything, I own SGS3, SGS2, SGS, SGT10.1....so stealing another SGS is not an option for me
I just want to restore that phone to it's stock state (and then reflash again with CM10).
Anyone?
Virnik0 said:
I just want to restore that phone to it's stock state (and then reflash again with CM10). Anyone?
Click to expand...
Click to collapse
you can get a rescue kit from My Android Collections and or a solution from My Android Solutions
just flash a JVU and a PIT , should get you back your IMEI or look at My android solutions for details
xsenman said:
you can get a rescue kit from My Android Collections and or a solution from My Android Solutions
just flash a JVU and a PIT , should get you back your IMEI or look at My android solutions for details
Click to expand...
Click to collapse
Why are you so confident, that JVU will regenerate /efs?
as said before, my father was so genius, that he has wiped /efs partition out. I have restored some data, but without proper IMEI, so now I have generic one. I still do have old JVU package somewhere on my NAS, but I do not understand, how old firmware may help, because I am without any /efs backup anywhere... is that firmware customized so it checks and regenerates /efs if its damaged? If so, why is this feature missing from latest full JW5 firmare? Please understand that I know what I am doing, but right now, I have empty hands...without JTAG, z3w or similiar low-level gadget, it is really hard to restore proper /efs on my own...
But thank you for links, I will take a look on them...
More Clues On Fixing IMEI Issue (solved for me)
In my case I upgraded directly from Froyo to CM10.1 and got then same dreaded 'default' invalid/corrupt IMEI=004999010640000
On inspection of the /efs files present it was clear they had been created by the system in response to not being present.
Following advice in this thread and elsewhere I downgraded back to Froyo (XXJPU) and like magic my correct IMEI re-appeared but as soon as I upgraded up to CM9 it changed back to the invalid default of 004999010640000 again.
To cut a long story short I downgraded back to Froyo (XXJPU) again, flashed a recent CWM recovery and booted into the recovery. I then used ADB to get a (root) shell prompt and discovered that the correct /efs data was being mounted from the device /dev/stl3 and at this point I was able to tar up the contents of /efs and safely make a backup. I then upgraded to CM10.1, restored the correct /efs backup and rebooted.
Happy with correct IMEI now
I am not sure what is going on but I am speculating that the big jump from Froyo to CM10.1 bypasses come critical intermediate ROM build where the correct IMEI data is copied from /dev/stl3. CM10.1 assumes this step has taken place and makes no attempt to get the original IMEI data.
... Robert
robertrath said:
In my case I upgraded directly from Froyo to CM10.1 and got then same dreaded 'default' invalid/corrupt IMEI=004999010640000
On inspection of the /efs files present it was clear they had been created by the system in response to not being present.
Following advice in this thread and elsewhere I downgraded back to Froyo (XXJPU) and like magic my correct IMEI re-appeared but as soon as I upgraded up to CM9 it changed back to the invalid default of 004999010640000 again.
To cut a long story short I downgraded back to Froyo (XXJPU) again, flashed a recent CWM recovery and booted into the recovery. I then used ADB to get a (root) shell prompt and discovered that the correct /efs data was being mounted from the device /dev/stl3 and at this point I was able to tar up the contents of /efs and safely make a backup. I then upgraded to CM10.1, restored the correct /efs backup and rebooted.
Happy with correct IMEI now
I am not sure what is going on but I am speculating that the big jump from Froyo to CM10.1 bypasses come critical intermediate ROM build where the correct IMEI data is copied from /dev/stl3. CM10.1 assumes this step has taken place and makes no attempt to get the original IMEI data.
... Robert
Click to expand...
Click to collapse
Exactly that. Same goes with going from Gingerbread to Jelly Bean.
That critical intermediate rom... Is CM9
In other words, to safely preserve your IMEI,
Froyo/GB ---> CM9 ----> CM10/10.1/JB
Sent from my GT-P7510 using Tapatalk HD
HEY GUYS, I am new here and I just wanted to say how much you guys helped me in the past! THANKS
Anyway, recently, I superbricked my Galaxy Note -N700 and i sent it in for a JTAG repair. It did turn on again, but it will NOT read my SIM card. The IMEI is unknown, baseband is unknown. i don't know what to do. I spent 50 bucks on the JTAG service but there was no point. I still cant use it. Can you guys help me out please?!
Have you got an efs backup? Try flashing a new radio / modem or reverting back to gb firmware and see if it comes back.
Sent from my GT-N7000 using xda premium
azzledazzle said:
Have you got an efs backup? Try flashing a new radio / modem or reverting back to gb firmware and see if it comes back.
Sent from my GT-N7000 using xda premium
Click to expand...
Click to collapse
I do not have an efs backup, because i did not know this will happen after JTAG.
Also, how do you flash new radio? sorry im new to all this stuff :/ and im on gb 2.3 right now.
Thanks!
Explore your sdcard and check if there is a file "efs.img" or "efs.autobackup.img"
Some kernell automaticaly do a backup of efs partition during install, maybe you'll be lucky.
i have efs back up but i dont know how to do can somebody tell me steps ?
My brother owns an AT&T cappy...n after some months of custom rom flashing, he gave me the phone asking me to repair it.
It has stopped reading the sim card, when i checked the imei of the device it gave me a popup of IMEI null/null..also the baseband version is also unknown..
I have many a times flashed the stock rom as every thread about my problem is telling me to do..
also used galaxy s unlock, app for factory unlocking GS devices..but know success
i seriously want to give it a last try before handing it over for a repair outside..
any help would be highly appreciated!!!!!:crying:
Yep, usually using Odin or Heimdall to return to stock firmware should restore the imei. Have u tried to flash to Stock KK4 firmware yet ? The Odin or Heimdall One Clicks for i897ucKK4 can be found here... http://forum.xda-developers.com/showpost.php?p=18370912&postcount=3.
yess!! many a times..but no success
I also wanted to add that :-
during the galaxy s unlock method..i usually get the busybox problem error...though i've installed and verified it many a times
With all the months of flashing that ur brother did...i would think there would be a backup of the efs folder on the sdcard?? Some roms and kernels, when flashed, will create the efs backup for u.
yess!! hopefully dere's an EFS folder.. but i was too bugged up when googling for the method for restoring it..
n also i'm not sure whether the folder is fine or corrupted/messed up..
also i'll be greatful if i'll get to know the easiest step by step process of restoring it.:good:
gautamchawla195 said:
yess!! hopefully dere's an EFS folder.. but i was too bugged up when googling for the method for restoring it..
n also i'm not sure whether the folder is fine or corrupted/messed up..
also i'll be greatful if i'll get to know the easiest step by step process of restoring it.:good:
Click to expand...
Click to collapse
Its as simple as replacing the current one with the backup one.
Sent from my SGH-I747 using xda app-developers app
??
Where to replace...in the root of the system or the SD card,???
busybox error!!!
Can anyone tell me about the BUSYBOX ERROR I'm receiving..??
gautamchawla195 said:
Where to replace...in the root of the system or the SD card,???
Click to expand...
Click to collapse
If you check on the internal sd, you'll see an efs folder. Should probably take a look for yourself before asking those questions
Sent from my SGH-I747 using xda app-developers app
I have nexus 6 in Canada.
I had android 5.0.1. I know it was 5.0.x stock - not OTA updated.
I decided to install chroma rom using the thread here.
http://forum.xda-developers.com/nexus-6/development/rom-chroma-01-11-2015-t3000003
I installed twrp, and chroma.
I followed the instructions and it worked.
I didn't flash a radio myself. just the chroma rom, gapps, and supersu.
It worked yesterday.
This morning I got a message that android phone app stopped.
I could not make phone calls or sms.
I didn't put much thought into the error message.
I wanted something more stock and I just installed lightrom.
I only installed lightrom, no other flashing.
http://forum.xda-developers.com/nexus-6/development/rom-5-1lightromstock-lmy47e-03-19-2015-t3059493
The problem persists -- no phone calls or sms.
now:
I looked at my about phone in the settings and it says unknown IMEI.
Any pointers to how I can fix this?
Did you flash correct radio ?
Can you see your imei ?
If nothing works flash latest stock.
Sent from my Nexus 6 using XDA Free mobile app
What does it say when you type *#06* into the dialer
I see unknown imei in settings about phone status imei info.
I didn't flash a radio individually. I don't know if one of the roms flashed a radio with it.
androiduser2011 said:
Did you flash correct radio ?
Can you see your imei ?
If nothing works flash latest stock.
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
ricey1986 said:
What does it say when you type *#06* into the dialer
Click to expand...
Click to collapse
Update:
I had made a twrp backup of the efs partition. I restored it.
Now the phone calls, sms, and everything works.
Anyone know why it lost the imei?
It was working, I didn't flash anything but the imei disappeared.
david1212 said:
Update:
I had made a twrp backup of the efs partition. I restored it.
Now the phone calls, sms, and everything works.
Anyone know why it lost the imei?
It was working, I didn't flash anything but the imei disappeared.
Click to expand...
Click to collapse
hi david,
i have same problem, lost my imei, and unknown baseband
can you upload "twrp backup of the efs partition" please...
i hope that can help me too
david please share efs backup from twrp, hope it help others
His efs backup will not help others. It is unique to his device and will only work for his. Its basically a I'd number. Loosing an imei is serious stuff and makes your phone useless. I'm glad you had a backup. Now I'm curious how so it don't happen to others. Flashing radios won't wipe efs.
Sent from my Nexus 6 using XDA Free mobile app
Should I make backup of EFS partition from time to time? Is it change? Is it depend on ROM? I made a backup after I unboxed Nexus. I have EFS backup on my phone, notebook and external hard drive... I hope it is safe
I had the same issue with a Galaxy S5 a while ago, I had to search and find a IMEI repair tool, which I don't think you will find on XDA as it can be used for bad purposes. But they are out there.
You only need 1 backup but the question is how this is happening. I see a lot of threads about it. So its an issue that we all need to figure out how and get preventative measures figured out
Sent from my Nexus 6
From what I've heard, if you flash all of the stock components through ADB (ROM, bootloader, modem, etc), it will trigger a rebuild of the EFS. I'm not 100% sure of this, but I remember reading something along those lines. I believe the phone has a backup partition for the EFS (which contains the IMEI, MAC Addresses, etc).
Product F(RED) said:
From what I've heard, if you flash all of the stock components through ADB (ROM, bootloader, modem, etc), it will trigger a rebuild of the EFS. I'm not 100% sure of this, but I remember reading something along those lines. I believe the phone has a backup partition for the EFS (which contains the IMEI, MAC Addresses, etc).
Click to expand...
Click to collapse
That sounds fantastic. It should be that way.
Sent from my Nexus 6 using XDA Free mobile app
david1212 said:
Update:
I had made a twrp backup of the efs partition. I restored it.
Now the phone calls, sms, and everything works.
Anyone know why it lost the imei?
It was working, I didn't flash anything but the imei disappeared.
Click to expand...
Click to collapse
upload please...please...please...
henhida said:
upload please...please...please...
Click to expand...
Click to collapse
As others have said. The EFS backup is unique to my device. It won't help you with yours.
If you absolutely cannot regenerate it with the method I said, warranty service is your best bet.
Sent from my SM-N900T using Tapatalk
Never tried this myself, but here is a guide for imei recreation on a Samsung device. At the very least it will give you an idea of some additional things you might try.... http://forum.xda-developers.com/galaxy-s2/general/guide-recover-imei-9-steps-t1264021
Sent from my Nexus 6 using Tapatalk
Hi,
I am in India and just purchased an unlocked t mobile note 4 yesterday.
I rooted it and installed Maximum Overdrive ROM. Now EMEI is gone and shows null. I did do a backup of efs using Dr. Ketan EFS backup app but somehow the folder got deleted.
Please suggest if there is any way to recover the emei? Please suggest. THANKS
Isn't the IMEI number located under the battery?
it is there... but since its shows null when I check by *#06# phone is not reading the SIM card... says SIM card is not registered
Its an unlocked T mobile phone
AlkaliV2 said:
Isn't the IMEI number located under the battery?
Click to expand...
Click to collapse
kanu1and said:
it is there... but since its shows null when I check by *#06# phone is not reading the SIM card... says SIM card is not registered
Its an unlocked T mobile phone
Click to expand...
Click to collapse
I'm not comfortable giving you any advice at this point because you're clearly using this phone in an international unlocked way and any advice I could provide could lead to further damage. You can Google Search "Restore IMEI without EFS Backup" and find guides that will help, but if you decide to follow them that will be on you. Sorry I can't be of more assistance.
Thanx for reverting mate... got it fixed... flashed stock kitkat old version and everything is working fine now... :good:
AlkaliV2 said:
I'm not comfortable giving you any advice at this point because you're clearly using this phone in an international unlocked way and any advice I could provide could lead to further damage. You can Google Search "Restore IMEI without EFS Backup" and find guides that will help, but if you decide to follow them that will be on you. Sorry I can't be of more assistance.
Click to expand...
Click to collapse
Glad to hear everything is working fine now, if possible make a brand new EFS backup and store it off the phone. I have tried different apps and by default most store the folder in the phone (which doesn't make any sense) so i had to manually export it. I am currently using EFS Manager(IMEI)-Note4 which lets you backup to the SD and cannot recommend it enough.
did that already mate... this time I have copied complete folder as well using root explorer...
cant take chances
Sent from my SM-N910T using Tapatalk
Note 4 imei null
I have same problem, how did you fix it? Please share, thnx
Flash stock ROM reroot and flash custom... that should fix the issue
Sent from my SM-N920G using Tapatalk