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How To: Create A Backup Or Restore The EFS/IMEI Of Samsung’s Galaxy S6 And S6 Edge

Last updated: December 4, 2018.

The Samsung’s Galaxy S6 And S6 Edge

Samsung has provided great specs for their Galaxy S6 and S6 Edge, but if you’re an Android power user, you want to go beyond the manufacturer specs.  There are already a lot of custom ROMs and MODs, custom recoveries and tweaks available for these two devices.

One of the greatest risks that users take when trying to tweak their Samsung Galaxy device would be the possibility of the corruption of the EFS partition.  EFS, which stands for Encryptions File System, is where all the RADIOS and MAC addresses of your device are placed.  So EFS affects your phone’s connectivity, including WiFi and Bluetooth capabilities.  The EFS partition also contains your network parameters and the IMEI information of your device.  In short, damaging your EFS partition wipes the communication capabilities of your phone.

Your EFS partition can be corrupted if you flash an invalid file on your device.  An invalid file could contain an invalid modem and bootloader.  A firmware downgrade can also cause corruption in your EFS, specifically, it can cause a null IMEI.

While a corrupted EFS partition sounds bad, it’s not a reason to stop tweaking your device.  But it is the reason why you need to back up your EFS partition.  Even if you have caused your IMEI to go null, by restoring your EFS backup, you can fix the problem.

In thig guide, were going to show you how you can back up and restore the EFS partition on a Samsung Galaxy S6 and S6 Edge.  You can do so by using Wanam’s EFS Backup application.

Prepare your phone:

  1. Thie guide and the app we are going to use is for variants of the Samsung Galaxy S6 and S6 Edge. Make sure that your device is one of the following:
    1. Galaxy S6: G920F,G920I,G920K,G920L,G920S,G9208,G9209,G920W8,G920FD, G920FQ
    2. Galaxy S6 Edge: G925F,G9250,G925FQ,G925I,G925K,G925L, G925S,G92508,G92509,G925W8
    3. Galaxy S6 and S6 Edge versions for: T-Mobile, Verizon, AT&T, Spring, US Cellular
  1. You need root access for this method so, if you haven’t already rooted your device, do so. 

Backup EFS/IMEI partition on Samsung Galaxy S6 or S6 Edge

  1. Downloadand install Wanam’s Partitions Backup application
  2. Openthe app.  Grant it SuperSu rights.
  3. At the top of the app, you will see a small tools setting button, click it.
  4. Select the format you want to backup the EFS partition to be made in. ( .tar and .img formats)
  5. You will see a partitions list, select EFS and RADIO partition.
  6. At the lower right corner, you will see a small arrow in a circle. Tap it.
  7. You should get a confirmation message, tap BACKUP.
  8. You will now find that you’re EFS files are located in the “Partitions Backup” found in your internet storage.

Restore EFS/IMEI partition on Samsung Galaxy S6 or S6 Edge

  1. Open the partitions backup application
  2. At the top of the app, you will see a small tools setting button, click it
  3. Select restore a partition. Select your radio and efs .img files from the partitions backup folder you made in the first step of this guide.
  4. When you’ve selected the files, follow on-screen instructions and you will be able to restore your lost IMEI.

Have used this to backup and restore your EFS/IMEI partition?

Share your experience in the comments box below.

JR

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