In the following video-tutorial, I am going to explain two different but equally effective ways to restore backup of the EFS folder, an essential folder for the proper functioning of our Android terminal.
In a previous tutorial, I explained to them the correct way to do said Backup, a backup that can save us from having a bad drink with our beloved device Android.
To achieve this we have two different methods:
Method 1: With a root file explorer
To restore the backup of our EFS folderWe will do it in the same way that we made the aforementioned copy.

The process is the same but in reverse, we must copy the EFS folder that we have safely stored and copy it through the Root Explorer, EN File Explorero similar to the route / efs.
Then we will have to restart in Recovery Mode and perform the steps that I indicate in the third title of this post.
Method 2: using Galaxy S Unlock
Galaxy S Unlock is a free application that we can find in the Play Store, and that will help us release terminals family Samsung Galaxy S.
With this program, in addition to unlock Samsung Galaxy S, S2 and S3, we can restore the EFS folder in a very comfortable way.
To restore it we will only have to copy the EFS folder that we have saved to the path Galaxy_S_Unlock from the sdcard and click on the tab Unlock and select the last option of all, the one called restore saved efs folder.
After this we will have to enter the Recovery Mode and do the following Wipes:
Final step from Recovery Mode
- Wipe data factory reset
- Wipe cache partition
- Advanced / wipe dalvik cache
With this and after the restart of the terminal we will have EFS folder restored and we will have our IMEI available again.
More information - How to Unlock Samsung Galaxy S and Samsung Galaxy SII with Galaxy S Unlock, How to backup EFS folder
Download - Galaxy S Unlock

