We all known that EFS partition holds the imei,sn ,wifi mac & other important data.
In Snapdragon the EFS partition are modemst1 ,modemst2 & FSG partitions. so it's important to take backup of these partitions.
INSTRUCTIONS
In Snapdragon the EFS partition are modemst1 ,modemst2 & FSG partitions. so it's important to take backup of these partitions.
INSTRUCTIONS
1. Connect your phone to PC , adb debugging enabled & goto adb shell by,
Code:
adb shell su
Open terminal emulator app in your phone & take super user permissions, by
Code:
su
2. Type following commands to backup imei partitions.
Code:
dd if=/dev/block/mmcblk0p16 of=/sdcard/mmcblk0p16_modemst1
dd if=/dev/block/mmcblk0p17 of=/sdcard/mmcblk0p17_modemst2
dd if=/dev/block/mmcblk0p20 of=/sdcard/mmcblk0p20_fsg
Also these are some important partition you should consider to backup.
modem, fsc, bk1, ddr.
Code:
dd if=/dev/block/mmcblk0p23 of=/sdcard/mmcblk0p23_modem
dd if=/dev/block/mmcblk0p9 of=/sdcard/mmcblk0p9_DDR
dd if=/dev/block/mmcblk0p12 of=/sdcard/mmcblk0p12_bk1
dd if=/dev/block/mmcblk0p18 of=/sdcard/mmcblk0p18_fsc
Now the backup is stored in you internal storage ,store these files in safe place.
in case u get invalid imei or unknown, restore these partitions.
To restore these partitions
Code:
dd if=/sdcard/mmcblk0p16_modemst1 of=/dev/block/mmcblk0p16
dd if=/sdcard/mmcblk0p17_modemst2 of=/dev/block/mmcblk0p17
dd if=/sdcard/mmcblk0p20_fsg of=/dev/block/mmcblk0p20
dd if=/sdcard/mmcblk0p23_modem of=/dev/block/mmcblk0p23
dd if=/sdcard/mmcblk0p9_DDR of=/dev/block/mmcblk0p9
dd if=/sdcard/mmcblk0p12_bk1 of=/dev/block/mmcblk0p12
dd if=/sdcard/mmcblk0p18_fsc of=/dev/block/mmcblk0p18
NOTE: Don't use tools or commands from other device because different devices has different partition address, that will result in wrong backups.
To use this method to backup other phones EFS , u should find your partition info.
Redmi 1s Partition tables can be found HERE
CREDITS : Sector1369@xda
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