Database Users

Help me to recover my IMEI (nv_data.bin)

I tried to delete nv_data.bin and nv_data.bin.md5 in order to recover original version from .nv_data.bak and .nv_data.bak.md5 after reboot but failed.
Firstly I remounted efs partition with -w flag:
Code:
mount -w -t ext4 /dev/block/mmcblk0p1 /efs
First file've been deleted but for second message 'read-only system' shows up. And when i unmount and then mount again first file appears again.
I tried to do these from terminal emulator, adb shell from booted phone and in recovery mode (with CF4 installed).
My firmware version XWKE7. I bought phone as sim free at clove.co.uk
Can anyone suggest what can i do?

From what I have read from the SGS forum if your efs folder is missing your imei your stuck, only thing to do is flash some stock FW from odin and return it, hope you can return it under warranty mate.
Sent from my GT-I9100 using XDA Premium App

wow, seriously unlucky try pushing it through adb?
EDIT: nevermind
try restoring & wiping everything, then rooting, then try and push it through adb ?

You could try the backup and restore efs post from dev section if you have not already .
jje

JJEgan said:
You could try the backup and restore efs post from dev section if you have not already .
jje
Click to expand...
Click to collapse
Yes, but it only works if he backed up his efs folder before he lost his imei.
Sent from my GT-I9100 using XDA Premium App

Kstarz said:
Yes, but it only works if he backed up his efs folder before he lost his imei.
Sent from my GT-I9100 using XDA Premium App
Click to expand...
Click to collapse
I know but may be more help their than elsewhere .
Restore IMEI post on SGS1 forum from memory as well .
Lost mine on SGS1 but a simple stock rom install restored it .
jje

EFS IMEI Backup?

I have root my S4 and will make a backup from efs/imei but EFS Professional not working with the S4. How can i backup efs?

is it so hard to get a copy of ur EFS folder to safe place ?

You can use TWRP recovery to get a EFS backup
Gesendet von meinem GT-I9505 mit Tapatalk 2

You can back up a whole partition with Terminal Emulator from Play Store.
This is example made for I9505 ONLY!!!!
For I9500 use mmcblk0p3 and efs.img instead!!!
Download it , and run it, then type:
Code:
su
dd if=/dev/block/mmcblk0p10 of=/mnt/sdcard/efs.img.ext4
and it will dump whole partition into one file efs.img.ext4 on your internal SD card
or
Code:
su
dd if=/dev/block/mmcblk0p10 of=/mnt/extSdCard/efs.img.ext4
to save it on external SD.
If something goes wrong and you need to restore it:
Code:
su
dd if=/mnt/sdcard/efs.img.ext4 of=/dev/block/mmcblk0p10
or
Code:
su
dd if=/mnt/extSdCard/efs.img.ext4 of=/dev/block/mmcblk0p10
Keep it safe and enjoy

djembey said:
You can back up a whole partition with Terminal Emulator from Play Store.
Download it , and run it, then type:
Code:
su
dd if=/dev/block/mmcblk0p10 of=/mnt/sdcard/efs.img
and it will dump whole partition into one file efs.img on your internal SD card
or
Code:
su
dd if=/dev/block/mmcblk0p10 of=/mnt/extSdCard/efs.img
to save it on external SD.
If something goes wrong and you need to restore it:
Code:
su
dd if=/mnt/sdcard/efs.img of=/dev/block/mmcblk0p10
or
Code:
su
dd if=/mnt/extSdCard/efs.img of=/dev/block/mmcblk0p10
Keep it safe and enjoy
Click to expand...
Click to collapse
With all respect to your post, I would like to warn people that this is not working for all the models/devices. Although it might look fine when executing the commands, it might not have made a backup of EFS, but of something else... What I know for sure is that it will not work for atleast the international i9505-model of the S4, as the partition layout is different.
In my post below, more details are given on this partition id.
http://forum.xda-developers.com/showthread.php?t=2276599
While executing your commands does not affect the device, it does not always give the people a backup they expect it to be, depending on their device/model. In my case you are able to verify which 'mmcblk' is actually efs on your device. It also gives a TAR backup as option.

Mr_Q said:
With all respect to your post, I would like to warn people that this is not working for all the models/devices. Although it might look fine when executing the commands, it might not have made a backup of EFS, but of something else... What I know for sure is that it will not work for atleast the international i9505-model of the S4, as the partition layout is different.
In my post below, more details are given on this partition id.
http://forum.xda-developers.com/showthread.php?t=2276599
While executing your commands does not affect the device, it does not always give the people a backup they expect it to be, depending on their device/model. In my case you are able to verify which 'mmcblk' is actually efs on your device. It also gives a TAR backup as option.
Click to expand...
Click to collapse
Mate... I've added that it is for I9505!!!!
I9500 have EFS located @ mmcblk0p3...........
thanks

I used GS2 repair from play store. It went through the usual process and I can see the back up file on the sd card. Can anybody more qualified confirm if this app works on S4?
Sent from my GT-I9505 using xda premium

djembey said:
Mate... I've added that it is for I9505!!!!
I9500 have EFS located @ mmcblk0p3...........
thanks
Click to expand...
Click to collapse
Great. You are right, in my case it's mmcblk0p10 as well, as mentioned correctly in my guide already.
Thank you for updating.
HANDSY said:
I used GS2 repair from play store. It went through the usual process and I can see the back up file on the sd card. Can anybody more qualified confirm if this app works on S4?
Sent from my GT-I9505 using xda premium
Click to expand...
Click to collapse
The best thing is to check it with the developer. I do not know what file has been created, although I expect it to be a raw copy using dd. The best thing is to do it manually. Or by the instructions given by djembey, or by the more detailed step-by-step instructions in the thread of my previous post here.

Hey, I managed to backup the EFS folder. Is there any way to modify the backup file and restore it after the modification? I want to change the IMEI number but unfortunately I have no box / cables available to do so. There must be a solution?! I am currently living in Turkey and they restrict western mobile phone usage for foreign people.
thanks a lot
cheers,
ralf

,
ralfa1234 said:
Hey, I managed to backup the EFS folder. Is there any way to modify the backup file and restore it after the modification? I want to change the IMEI number but unfortunately I have no box / cables available to do so. There must be a solution?! I am currently living in Turkey and they restrict western mobile phone usage for foreign people.
thanks a lot
cheers,
ralf
Click to expand...
Click to collapse
Same here with me

i9505 imei null
please can somebody help me,what ever I try not working.Unfortynately everything working,but always show imei null and not have baseband,of course and network too.I am install with Odin few different fabrics roms or how you call that.Last is this one with 4 files inside
I9505XXUGNG8_I9505OXXGNG2_I9505XXUGNG8_HOME.tar.Everything going fine,but havent imei like on start.I am also try few different things with EFS_Professional.but cannot fix my problem.Also I am try to erase EFS,but folder cannot erase,just files inside,and trying other one downloaded from net,but not going.Every time after reboot,EFS be back automatics,Can you help me ,please
If I am write inside EFS folder must be a file nv_data.bin ,I dot have that.Have lots of,but dont see that.I have inside few folders,like imei and etc.. And inside imei folder I have mps_code.dat.I am hope somebody can understand my problem.Can somebody sent to me that file,and can I take from other phone.Is that my solution,or what.HELP PLEASE

this is in function to my i9505,but not help me to solve problem.Somehow I not have file nv_data.bin on my phone in efs folder,and backup and restore not help me.Please do you no some solutions?

[Q] how do I take esf backup?

How do I take esf backup?
Thank you for your kind answers.
Sent from my Nexus 4 using xda app-developers app

pwned_me said:
How do I take esf backup?
Thank you for your kind answers.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
AFAIK this partition is an exclusive partition on Samsung devices...

Isn't it efs on Samsung?

audit13 said:
Isn't it efs on Samsung?
Click to expand...
Click to collapse
Yeah you're right! Is it a spelling error? Never heard of esf...

Nexus 4 doesn't have a efs partition.
[DEVICE : N⁴][ROM : crDROID][KERNEL : AK]
[LAUNCHER : NOVA][CARRIER : T-MOBILE][CASE : NONE] ​

Well my friend lost his emi and stuff when he tried to flash a ROM on Gnex , when i googled about it, he mentioned about esf thing.
Sent from my Galaxy Note II using xda app-developers app

pwned_me said:
Well my friend lost his emi and stuff when he tried to flash a ROM on Gnex , when i googled about it, he mentioned about esf thing.
Sent from my Galaxy Note II using xda app-developers app
Click to expand...
Click to collapse
If your friend is lucky few ROMs will take EFS backup in SDCard and there are tools which can restore IMEI number. If you do flash other roms then better take a backup of efs folder. using root explorer you can archive and store efs folder.

imapk said:
If your friend is lucky few ROMs will take EFS backup in SDCard and there are tools which can restore IMEI number. If you do flash other roms then better take a backup of efs folder. using root explorer you can archive and store efs folder.
Click to expand...
Click to collapse
How do I take that?
Sent from my Nexus 4 using xda app-developers app

pwned_me said:
How do I take that?
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
check this post: LINK

There isn't an efs partition on nexus 4. It's a samsung thing. Galaxy nexus had it because it was made by SAMSUNG

Backing up ur ESF Partition
U need Root,Android Terminal Emulator and busy box to successfully backup your ESF Partition. Type the following codes to backup/restore the ESF partition.There is another block mmcblk0p10 which contains the m9kefs3.img however the same is blank(So backup not mandatory). The m9kefs2.img contains the IMEI information. Also kindly backup the same to ur PC / Email or Drive
Also these codes remain the Same for Android 4.4(Kitkat) & 4.2(JB). However for Android 4.3(JB) change the storage path to storage/emulated/legacy
Code:
su
dd if=/dev/block/mmcblk0p8 of=/storage/emulated/0/m9kefs1.img
dd if=/dev/block/mmcblk0p9 of=/storage/emulated/0/m9kefs2.img
Restore.
su
dd if=/storage/emulated/0/m9kefs1.img of=/dev/block/mmcblk0p8
dd if=/storage/emulated/0/m9kefs2.img of=/dev/block/mmcblk0p9
Hit the Thanks Button as a Token of Appreciation

Null IEMI , Unknown Baseband , no any efs backup . overwite efs by another device

Hi .
i have a i9500 device and my device baseband is null , IEMI is null .
Flashing official rom android 4.3 ... problem not solved ...
flashing custum rom ... problem not solved ...
downgrade to 4.2 .... problem not solved ...
flashing radio/modem ..... problem not solved ...
Remove EFS partition create again and mount again with adb shell ... problem not solved
overwrite EFS partition with another device partition . problem not solved ...
backup
EFS partition,
m9kefs1 partition ,
m9kefs2 partition,
m9kefs3 partition ,
CARRIER partition ,
CDMA-RADIO partition
RADIO partion ,
from another device with this commands
dd if=/dev/block/mmcblk0p3 of=/sdcard/efs.img
dd if=/dev/block/mmcblk0p4 of=/sdcard/efs1.bin
dd if=/dev/block/mmcblk0p5 of=/sdcard/efs2.bin
dd if=/dev/block/mmcblk0p6 of=/sdcard/efs3.bin
dd if=/dev/block/mmcblk0p7 of=/sdcard/carrier.bin
dd if=/dev/block/mmcblk0p12 of=/sdcard/cdma.bin
dd if=/dev/block/mmcblk0p13 of=/sdcard/radio.bin
then copy files to my device and restore with this command on my device
dd if=/sdcard/efs.img of=/dev/block/mmcblk0p3
dd if=/sdcard/efs1.bin of=/dev/block/mmcblk0p4
dd if=/sdcard/efs2.bin of=/dev/block/mmcblk0p5
dd if=/sdcard/efs3.bin of=/dev/block/mmcblk0p6
dd if=/sdcard/carr.bin of=/dev/block/mmcblk0p7
dd if=/sdcard/cdma.bin of=/dev/block/mmcblk0p12
dd if=/sdcard/radio.bin of=/dev/block/mmcblk0p13
BUT Problem Not Solved .....
HELP ME PLEASE

this should be in the Q&A thread bro.
first you always make an EFS Backup.
second don't restore any EFS from another device it will never work.
try this http://forum.xda-developers.com/showthread.php?t=2392632
or look for similar thread/posts as yours. goodluck :good:

I Have not any back Up ...
gonemad02 said:
this should be in the Q&A thread bro.
first you always make an EFS Backup.
second don't restore any EFS from another device it will never work.
try this http://forum.xda-developers.com/showthread.php?t=2392632
or look for similar thread/posts as yours. goodluck :good:
Click to expand...
Click to collapse
thanks ....
I did read that link ,,
but I have not any backup from my efs ...
What Should I do ?

tried flashing it back to stock? /efs folder empty right now? your last resort is to take it to your nearest service center

gonemad02 said:
tried flashing it back to stock? /efs folder empty right now? your last resort is to take it to your nearest service center
Click to expand...
Click to collapse
my efs folder is not empty ...
i restored efs from another device to this device ...

restoring another efs from another device will not do anything. because efs is related to your phone's S/N and IMEI. and it's like cloning or theft from another device. delete efs folder and reboot. if its still null imei. try reflashing stock rom. but if it does not work bring it to a samsung service center. they can fix that. or look for another forums to rewrite your whole efs including IMEI.

If your original EFS partition contents has been lost and you made no backup prior to that happening then there is nothing you can do. Flashing a stock rom won't fix it as the contents of that particular partition are unique to each phone and isn't touched when flashing.
Flash your original stock rom and take it to a service center, although make sure you format the EFS partition before hand. Just say it happened when you flashed it or something. I have even heard of one guy who's EFS was formatted just from turning on Airplane Mode, although I'm not sure he was being entirely honest about that. If your Knox flag is tripped you might find yourself on the wrong end of a bill though.

where is the baseband refrense
Pagnell said:
If your original EFS partition contents has been lost and you made no backup prior to that happening then there is nothing you can do. Flashing a stock rom won't fix it as the contents of that particular partition are unique to each phone and isn't touched when flashing.
Flash your original stock rom and take it to a service center, although make sure you format the EFS partition before hand. Just say it happened when you flashed it or something. I have even heard of one guy who's EFS was formatted just from turning on Airplane Mode, although I'm not sure he was being entirely honest about that. If your Knox flag is tripped you might find yourself on the wrong end of a bill though.
Click to expand...
Click to collapse
Hi , and thanks
Is there any way to put my imei and sn in efs folder (nv_data.bin)?
and I have a some question about BaseBand
how baseband read the baseband version (from where or form witch file or witch part of memory ) ?
and can you help me to find technical article about BaseBand and IMEI ?
sorry . if my english is not good ...
thanks ...

ERROR AFTER INSTALLATION CM11 Remove IMEI. As Lost ? HELP!

ERROR AFTER INSTALLATION CM11 on g360h
Remove IMEI. As Lost ? HELP!

dou u have backup of efs ?

Dreamstar said:
dou u have backup of efs ?
Click to expand...
Click to collapse
no..but i can use efs backup from my brother phone its g360h too..how restore my original efs..my efs folder is empty.. pls help me :crying:

hmm Follow these steps :
1.Go to Cwm recovery
2.Then Mount System and Data
3.Then Type Adb Device ( if device showing in list ).
4.Then Type Adb Shell
5.Type mke2fs /dev/block/mmcblk0p17
6.Then mount -w -t ext4 /dev/block/mmcblk0p17
7.Then Reboot !!
Now efs will fixed.

Dreamstar said:
hmm Follow these steps :
1.Go to Cwm recovery
2.Then Mount System and Data
3.Then Type Adb Device ( if device showing in list ).
4.Then Type Adb Shell
5.Type mke2fs /dev/block/mmcblk0p17
6.Then mount -w -t ext4 /dev/block/mmcblk0p17
7.Then Reboot !!
Now efs will fixed.
Click to expand...
Click to collapse
Type Adb Device ??? where i can Type in Cwm recovery

when u connect to pc
then go to command prompt
then type adb devices

Dreamstar said:
when u connect to pc
then go to command prompt
then type adb devices
Click to expand...
Click to collapse
hmm floder is back.. efs is fix..but imei ist 000000000000000 and still no network?? and now ?

just copy efs folder

Dreamstar said:
just copy efs folder
Click to expand...
Click to collapse
i dont understand you brother... It already exists ..

@mv2007
any cm rom works with your g360h???

adamh.ayyad said:
@mv2007
any cm rom works with your g360h???
Click to expand...
Click to collapse
no one

mv2007 said:
ERROR AFTER INSTALLATION CM11 on g360h
Remove IMEI. As Lost ? HELP!
Click to expand...
Click to collapse
Where you got the CM11?Is it of @Dreamstar?

dRbXDA said:
Where you got the CM11?Is it of @Dreamstar?
Click to expand...
Click to collapse
yes its cm 11 by dreamstar. and its not working

@mv2007
have u repaired ur imei
need help here... my imei is lost

$!n$ter said:
@mv2007
have u repaired ur imei
need help here... my imei is lost
Click to expand...
Click to collapse
You should backup your efs before installing custom rom. Mines has been repaired. Thanks to my friend who give his efs folder.

JustFrame said:
You should backup your efs before installing custom rom. Mines has been repaired. Thanks to my friend who give his efs folder.
Click to expand...
Click to collapse
i hav my efs copied
i tried but cannot restore
how did u restore the imei

$!n$ter said:
i hav my efs copied
i tried but cannot restore
how did u restore the imei
Click to expand...
Click to collapse
My friend backed-up his efs folder by TWRP and send to me and I restore by TWRP also.

JustFrame said:
My friend backed-up his efs folder by TWRP and send to me and I restore by TWRP also.
Click to expand...
Click to collapse
thanks dude...:good:

$!n$ter said:
thanks dude...:good:
Click to expand...
Click to collapse
No problem dude.

do the efs need to be backuped from core prime varient to install in my phone