Nokia 14 — How To Open Bootloader Mode On
Power off the phone completely. Step 2: Press and hold the Volume Down button. Step 3: While holding Volume Down, press and hold the Power button. Step 4: Keep both buttons pressed for about 10–15 seconds. Step 5: Release when you see a screen with small text or a "Start" / "Fastboot" option.
Nokia devices typically use a combination of the Volume Down and Power buttons. how to open bootloader mode on nokia 14
Alternatively, you can try the hardware key combination (if ADB is not working): Power off the phone completely