The cause of the Error Baseband Version Not Known could be the result of a damaged or misplaced EFS folder, which contains the telephone’s IMEI number. This error is a sign of the fact that your EFS file is severely damaged. This is the ID card for your phone. You can verify your IMEI numbers by calling *#06#. Check out the secret codes that work for all Samsung Galaxy variants (S2/S3/S4/S5) Unknown basebands can lead to – Not being registered with the network to correct the error In order to fix the issue of Unknown Baseband for the Android device, back up to restore your EFS folder. The EFS folder is accessible in any file management software. But recovery and backup is a totally different matter. Follow these steps:

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METHOD 1

EFS is the abbreviation for Encrypting File System. it manages all communication and networking capabilities of Android. The most common error users do is install custom firmware and not conserving the EFS folder. Be sure to possess root privileges. If you don’t follow this link to create an encrypted root for your phone. You can enable the debug option on your smartphone. settings > options for developers > USB debugging is enabled. Connect to your Samsung Galaxy to your computer and download EFS Professional v2.0 > Exit and then run EFS Professional.exe Press EFS Professional A new window with additional information will be displayed. It will inform you that it found your device and you’re ready to move on. Go ahead. Choose the Backup tab. sure that all left partitions are highlighted, and that your device filter is working. Click the Backup button in order to back up the EFS folder. The process isn’t over yet. Now is the time to reconstruct it in order to restore the unidentified base bond. Click on to open the Restore tab, select to click the Restore button.

METHOD 2

Enter the debug mode on your Samsung Galaxy. Connect it to your computer. Download EFS Restorer Express. Then, open the folder and double-click EFS-BACKUP. The screen that opens chooses an EFS through the ODIN option for recovery. Baseband Version” represents the version of the firmware that runs on the cellular modem of your phone. If you’ve ever looked at your phone’s baseband display you’ve probably seen the version number of the baseband. If you’ve used any Android phone, then you’ve probably noticed that certain versions come with letters on the numbers.