Backup EFS partition [IMEI] - One Plus One (Must to be on the safer side) !
If you are going to play around with your device then Its must to backup the EFS partition !
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Commands -
su
dd if=/dev/block/mmcblk0p10 of=/sdcard/modemst1.bin bs=512
dd if=/dev/block/mmcblk0p11 of=/sdcard/modemst2.bin bs=512
To restore the EFS partition -
fastboot flash modemst1 modemst1.bin
fastboot flash modemst2 modemst2.bin
My Backup.zip - http://www.mediafire.com/download/5r4ljo4vwpt0642/My_backup.zip
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Link of Thread on XDA - http://goo.gl/FRmdtC
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Root One Plus One - http://goo.gl/vRcC9f
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