Enable Debugging mode on your handset -Settings >Developer Options>USB debugging“checked”
Connect your Samsung Galaxy to the Computer
EFS Professional v2.0  Download
Extract and run EFS Professional.exe
Click EFS Professional


A new window should appear with more information. It will show you that it has found your device and it’s all set, proceed


Head over to the backup Tab
Make sure all the partition is checked at the left and your device filter is recognized



Hit the Backup Button, To Backup Your EFS Folder
It’s not finished yet. It’s now the time to restore it to fix unknown baseband version on Samsung galaxy.
To restore it, it’s the similar way. Just navigate to the restore tab and hit restore button.

To Restore EFS Folder On Samsung Galaxy And Fix Unknown Baseband Version

Enter debugging mode on your Samsung galaxy
Connect your Device to the PC
EFS Professional v2.0  Download
Open The folder and double-click the EFS-BACKUP. BAT file
On the screen provided, select a method to restore the EFS via ODIN
Finish

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