IMEI is a unique identification number programmed onto your device and you can check the unique IMEI of your device by dialing *#06# or written on sticker under the battery. It is required in order to be correctly identified on a mobile network.
Without IMEI, you cannot make calls, send SMS or use mobile data.
EFS is a partition on the internal memory of your device which contain important data including the IMEI.
If the data in this partition gets corrupt, you will lose your IMEI
Requirements :
1. Samsung galaxy S4 device
2. "Android Terminal Emulator" app (Link below)
EFS Backing up Steps :
1. Open "Android Terminal Emulator" and type
It will ask for root permission
B. For galaxy S4 all LTE and US variant Type :
EFS Restoring Steps :
1. Send the files (Step 3) to the internal storage of your device
2. Open "Android Terminal Emulator" and type :
It will ask for root permission
3.A. For galaxy S4 GT-I9500 Type :
B. For galaxy S4 all LTE and US variant Type :
Done !
~ It won't delete your data
~ Make sure you choose the correct cmd in restoring process
~ This method will work only on ROOTED devices
~ Backing up EFS partition is highly recommended for users who use the custom Roms
~ Use it at your own risk
~ This method won't repair your device if you don't have a backup of the EFS partition, but you can to try this How to Fix "Not Registered on Network"/Wrong IMEI for Galaxy S3/S4/Note2
~ Every device has unique partition, so you can't use this if you have backup file from another device
Downloads :
Android Terminal Emulator App HERE
Without IMEI, you cannot make calls, send SMS or use mobile data.
EFS is a partition on the internal memory of your device which contain important data including the IMEI.
If the data in this partition gets corrupt, you will lose your IMEI
Requirements :
1. Samsung galaxy S4 device
2. "Android Terminal Emulator" app (Link below)
Before starting :
1. Root your device
2. Download and install "Android Terminal Emulator" app
1. Open "Android Terminal Emulator" and type
Su
Then enterIt will ask for root permission
2.A. For galaxy S4 GT-I9500 Type :
dd if=/dev/block/mmcblk0p3 of=/sdcard/efs.img
Then enterB. For galaxy S4 all LTE and US variant Type :
dd if=/dev/block/mmcblk0p10 of=/sdcard/efs.img
dd if=/dev/block/mmcblk0p11 of=/sdcard/mod1.bin
dd if=/dev/block/mmcblk0p12 of=/sdcard/mod2.bin
Then enter dd if=/dev/block/mmcblk0p11 of=/sdcard/mod1.bin
dd if=/dev/block/mmcblk0p12 of=/sdcard/mod2.bin
C. For galaxy S3 all LTE and US variant Type :
dd if=/dev/block/mmcblk0p11 of=/sdcard/efs.img
dd if=/dev/block/mmcblk0p12 of=/sdcard/mod1.bin
dd if=/dev/block/mmcblk0p13 of=/sdcard/mod2.bin
Then enter3. Backup the created files on your phone's internal storage to your PC or the cloud.
EFS Restoring Steps :
1. Send the files (Step 3) to the internal storage of your device
2. Open "Android Terminal Emulator" and type :
Su
Then enterIt will ask for root permission
3.A. For galaxy S4 GT-I9500 Type :
dd if=/sdcard/efs.img of=/dev/block/mmcblk0p3
Then enter B. For galaxy S4 all LTE and US variant Type :
dd if=/sdcard/efs.img of=/dev/block/mmcblk0p10
dd if=/sdcard/mod1.bin of=/dev/block/mmcblk0p11
dd if=/sdcard/mod2.bin of=/dev/block/mmcblk0p12
Then enterdd if=/sdcard/mod1.bin of=/dev/block/mmcblk0p11
dd if=/sdcard/mod2.bin of=/dev/block/mmcblk0p12
C. For galaxy S3 all LTE and US variant Type :
dd if=/sdcard/efs.img of=/dev/block/mmcblk0p11
dd if=/sdcard/mod1.bin of=/dev/block/mmcblk0p12
dd if=/sdcard/mod2.bin of=/dev/block/mmcblk0p13
Then enter4. Restart your device
Done !
YT Video link : http://www.youtube.com/watch?v=tJQjZgbmW3Y
Notes :~ It won't delete your data
~ Make sure you choose the correct cmd in restoring process
~ This method will work only on ROOTED devices
~ Backing up EFS partition is highly recommended for users who use the custom Roms
~ Use it at your own risk
~ This method won't repair your device if you don't have a backup of the EFS partition, but you can to try this How to Fix "Not Registered on Network"/Wrong IMEI for Galaxy S3/S4/Note2
~ Every device has unique partition, so you can't use this if you have backup file from another device
Downloads :
Android Terminal Emulator App HERE
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