How to backup / restore Galaxy S4 EFS?

Rooted your Galaxy S4? Then stay with me on this guide, else feel free to skip this. Without root access, you won’t corrupt or delete EFS. So you are safe.

EFS folder is a place that store all Samsung Galaxy S4 important data like Wi-Fi, Bluetooth MAC address and IMEI (nv_data.bin). Therefore, don’t play with system level folders especially EFS folder if you don’t know what they are. For you info, your Galaxy S4 can’t make voice call if IMEI number is missing. Therefore, it is better to make a backup of Galaxy S4 EFS. Why? Install unstable or poorly cooked Galaxy S4 ROM might cause EFS partition to be corrupted or missing too.

Backup Samsung Galaxy S4 EFS

How to backup Galaxy S4 EFS?

  1. First of all, install PhilZ Touch CWM for Galaxy S4.
  2. Boot into PhilZ Touch CWM then.
  3. Go to Backup and Restore.
  4. Select Custom Backup and Restore.
  5. Then click on Custom Backup Job.
  6. Uncheck everything.
  7. Then check Backup efs only.
  8. Select >> Start Custom Backup Job <<.
  9. Backup to either internal or external sdcard.
  10. That’s it.
Galaxy S4 EFS backup

PhilZ Touch CWM creates EFS backup at clockworkmod/custom_backup/.efs_backup folder. It is hidden by default. So enable show hidden files in ES File Explorer to see it. And do make a zip backup to your cloud storage or PC besides keeping a copy on external SD card. Restore Galaxy S4 EFS is about the same as ackup process. That’s it. Feel free to play around with your Galaxy S4 by install custom ROM and mod now.

  • Anwar

    Dear Jayce Ooi, After I root my S4 GT-I9500 with your method, is it possible,
    1. to make OTA, kies update?
    2. Is there any issue with the camera?
    3. The main purpose for my rooting is to access the data files directly from external SD (games, Iquran pro etc.), which version you suggest CWM recovery?

    thanks bro

    • 1. No, since custom kernel was installed. You need to install new firmware with Odin.
      2. Nope.
      3. PhilZ Touch CWM.

  • pritam das

    few week ago i created efs backup by PhilZ Touch CWM ..but now my device iemi got courpted . how to restored efs backup . i have that efs backup file in my cloud storage ..
    1st- where to copy that efs backup folder in phone memory ? or where should i cpy? and hot to restore it .

    • clockworkmod/custom_backup/.efs_backup folder

  • pritam das

    how to restore it ?? where i put .efs_backup folder in phone memory ?

    • The process is almost the same as backup. I did not try internal memory but should be same as external SD card.

  • Mohamed Khaled Mk

    i made all of this but when i opened extsdcard/clockworkmod/ i found backup folder not custom backup !! ….what i do ?

    • Hi Mohamed, that folder is hidden. Make sure that your file explorer can see hidden stuffs.

  • sam

    hi i lost original imei wat can i do plzz help me

    • Hi sam, did you backup EFS previously?

    • IMEIFixed

      Flash the original ROM that you lost IMEI After, fixed my IMEI without EFS!