Use ADB commands:
Samsung has progressively hardened its security. For the A107M, Bit 6 represents a specific iteration of the bootloader where Samsung Knox, Vault Keeper, and the RIL (Radio Interface Layer) have become hyper-aggressive about integrity checks. The "Bit" refers to the Samsung Bootloader Revision . When Samsung increments the bit (from 5 to 6), it introduces a anti-rollback mechanism. More importantly, for the A107M, Bit 6 patches the older "free" methods of EFS backup/restore. reparar imei a107m bit 6
On previous bits, you could simply flash a patched modem.bin or use a custom recovery to restore a TWRP backup of the EFS folder. On Bit 6, if the anti-rollback counter mismatches between your persist partition and the efs partition, the phone hard-bricks the IMEI to 0. Before touching IMEI, you must understand KG (KNOX Guard) State . On Bit 6, if your KG State is "Prenormal" or "Broken," any IMEI repair attempt will fail. Use ADB commands: Samsung has progressively hardened its
If you flash a Bit 6 ROM from 2022 (Patch level June 2022) but your EFS retains a date from 2021, the IMEI will vanish again within 3 reboots. When Samsung increments the bit (from 5 to
Welcome to the world of and Bootloader Bit 6 .