Resetting via UPD mode completely bypasses Android’s security model. This has two important consequences:
Why does this matter? The QM215 lacks a dedicated internal NAND controller separate from the eMMC chip. When the eMMC storage gets corrupted, the phone cannot boot to recovery or fastboot. This is where the "hard reset upd" method becomes necessary. qm215 emmc nokia hard reset upd
Once done, select Reboot system now to restart your device. qm215 emmc nokia hard reset upd