[International] Backing up EFS on Galaxy S4


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  1. yuriman1

    yuriman1 Member This Topic's Starter

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    Hi there,
    I am going to flash cyanogenmod on my Galaxy S4 GT-I9505. But i read that i have to back up some data. I tried to use "EFS Professional" but though i confirmed that popup where it says something with "RSA fingerprint" and the SU request, knox blocks it. So this way seems not to work.

    Now i just installed "root explorer" and manually back up the efs folder. It seems very small. Is that enough?

    [​IMG]

    Can i flash now?
     

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  2. yuriman1

    yuriman1 Member This Topic's Starter

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    push :D
    i can't stand this samsung stock ROM anymore.
     
  3. Shotgun84

    Shotgun84 Well-Known Member

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  4. yuriman1

    yuriman1 Member This Topic's Starter

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    Can i use that though i have twrp installed?

    i also did a backup with twrp and selected the efs partition, but it's so small, too.
     
  5. Shotgun84

    Shotgun84 Well-Known Member

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    You would need to replace twrp with philz. In my opinion philz is better anyway so it shouldn't be too much of a problem.
     
  6. lotus49

    lotus49 Well-Known Member

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    What is in the EFS folder and why does it need to be backed up?
     
  7. Shotgun84

    Shotgun84 Well-Known Member

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    It contains your imei number so if it gets wiped while flashing (not very common but has been known to happen) you won't be able to use your phone except as a Wi-Fi device.
     
    dynomot and lotus49 like this.

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