Nokia G21 Ta1418 Mdm Dump File Security Patch Link ((install)) Guide

Restore from a backup and reflash the phone with the correct firmware. This highlights the importance of keeping a known-good backup before attempting any repair.

As one forum user noted about recent changes in Nokia's security, "IMEI is no longer being repaired... What happens is just a patching of cert, but not actual repair (IMEI still old)". This illustrates how even semi-official tools can have unexpected results. Installing a compromised or incorrect dump file can also permanently brick your device. nokia g21 ta1418 mdm dump file security patch link

Replace [security_patch] with the build number. This does NOT remove MDM but allows you to match the dump file version. Restore from a backup and reflash the phone