Nokia G21 Flash Tool Full |work|
Flashing the Nokia G21 using the is an effective way to revive a dead or bricked phone. However, the secure bootloader architecture of Nokia devices means you may run into "Authentication" issues with free tools. If you are uncomfortable with these technical steps, it is highly recommended to visit an authorized Nokia Care center to avoid permanent damage to your device.
Install Unisoc/SPD USB Drivers on your PC to ensure the phone is recognized in boot mode. nokia g21 flash tool full