Используйте приложение APKPure
Историческую версию EFS☆IMEI☆Backup можно получить на Android
Резервное копирование EFS перегородки, и сохранить ваш IMEI в безопасном месте.
☆Root required☆
☆Samsung devices only☆
This application let you save a backup of your EFS (IMEI) partition (if exists) on any device running Android 3+, this help you to keep your IMEI safe from getting corrupted after any bad Rom flashing issues, this is a common issue with Samsung devices, if somehow you lost your IMEI, you won't be able to get registered and connected to any mobile network.
This App let you backup all related EFS (IMEI) partitions: efs, modem, radio...
Internal and external SdCard are supported for saved backups.
It's aimed to support all Android devices running Android 3+.
This App support 3 backup formats:
☆ Stock image copy (img)
☆ Tar archived image (No compression)
☆ Compressed GZ image (Small size)
I appreciate any suggestions.
Email me if you get any issues with this App.