How To Open Bootloader Mode On Nokia G20 ((full)) -

Connect your Nokia G20 to your PC via USB cable. When prompted on the phone, allow USB debugging.

: To leave Fastboot mode, press and hold the Power key for about 7–10 seconds until the device restarts normally . How to Open Bootloader Mode on NOKIA G20

For 99% of Nokia G20 users, unlocking the bootloader is impossible without a leaked engineering unlock token (which doesn't exist publicly). The mode exists on the phone, but the key has been thrown away by the manufacturer. Proceed only if you have a verified, official unlock code from HMD Global (which they no longer provide for this model). Otherwise, enjoy your phone as-is. Connect your Nokia G20 to your PC via USB cable

Note: If your phone simply reboots to Android, try connecting it to a charger or PC first, then perform the button combo while the charging icon is visible. For 99% of Nokia G20 users, unlocking the