How To Backup And Restore Samsung Android Devices EFS ‘/efs’ Folder [ Backup IMEI, NV Data ]

How to backup and restore Samsung phone and tablets devices contain EFS ‘/efs’ folder for backup IMEI, NV Data etc useful information. Using this step by step tutorial you can do this work. This is a most common question for most of the Samsung android devices owners while they are preparing to install a custom ROM and beta firmware. Because of sometime while you’re installing those after market or leaked firmware, it can be completely wiped the EFS folder and its contain data. As a result of that, you can’t connect to the mobile network. 

When mobile devices connecting to the mobile network they check your devices IMEI number (not only IMEI). Every device has a unique number, if your Samsung smartphone or tablet IMEI missed, your device not connected to the mobile network and you can see “No network” message. Moreover sometime you may experience “Unknown Baseband’ issue. You can fix that issue using this toolkit. 

This backup and restore method we use “EFS Pro” it’s a Windows computer based application for backup and restore EFS folder on your Samsung smartphone and tablet. It need install Microsoft .NET Framework 4.0 on your computer. This tool developed by the XDA forum “lyriquidperfection” member. You can donate him/here using above XDA forum profile link.

Download.
  • EFS backup pro in here. (Originally it posted on Galaxy S2 forum, but it work all most all the Samsung devices)
  • Microsoft .NET Framework 4 in here.

How to backup and restore Samsung phone, tablet EFS folder [ IMEI ].


This method we need the root permission and should install BusyBox on your phone or tablet. If you’re not sure you have the busybox, you can use “busybox installer” free app on the Play store.



Backup EFS partition.
  • Extract the downloaded zip file to the desktop.
  • Double click the ADB folder contain “adb.exe” file.
  • Now you can see the Windows command prompt and within a few seconds its close. That’s OK.
  • Enable USB debugging on your phone, go to “Settings>Developer options” and tick “USB debugging” or go to “Settings>Application” and tick USB debugging”.
  • Run the EFS pro application by double click on the “.exe” file.
  • Connect your phone to the PC via USB cable.
  • EFS Pro top “Data Backup Method:” drop down menu select “Create Partition Image (*.img)” or “Create Compressed TAR Archive (*.tar). (Create partition image OK).
  • Then you have to select a “EFS backup” saved location. Tick “Save Backup To DEvice Storage” or PC Storage” options. PC backup will store on the desktop EFS folder (EFSProBackup folder).
  • Finally click “Backup EFS” button.
  • Now you can see the backing up progress at the bottom of the EFS Pro.
  • If you can see root permission request on your Samsung device grant the permission.
  • When it’s display backup completed you can disconnect phone from the PC and install the custom ROM or beta firmware. 
  • Now keep that backup folder in a safe place (other than desktop better).




Restore EFS partition. 

  • Extract the downloaded zip file to the desktop.
  • If your EFS partition backup file saved another location, copy it into the “EFS Pro.exe” file contain folder separate folder and name it as “EFSProBackup”.
  • Run the EFS Pro application by double click on the exe file. 
  • Enable USB debugging on your Samsung device (Settings>Developer options” and tick “USB debugging” or “Settings>Application” and tick “USB debugging”.
  • Connect your phone to the PC via USB cable.
  • On EFSPro “Restore Options” click its “Re-Scan” button. 
  • Now you can see available backup files.
  • Choose one of the backup EFS in the drop down menu and tick “format/”efs folder before restore” option. 
  • Finally click “Restore ESF” button. 
  • Now you can see the restoring progress that the bottom of the application. When it display “Operation finished” disconnect phone from the PC. 

[via:XDA forum

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