Use your service tool (like Pandora or CM2) to back up original security partitions (NVRAM/NVDATA) to prevent IMEI loss .
While specific steps vary by tool, the general process for unlocking a Nokia G21 TA-1418 involves: nokia g21 ta1418 mdm dump file security patch better
A clean partition dump from a non-locked TA-1418 is frequently needed to overwrite the restricted areas of the device's firmware. Step-by-Step MDM Removal Overview Use your service tool (like Pandora or CM2)