If you own a REALME C12 and are looking to unlock the bootloader, flash a custom recovery (like TWRP), or manually install an OTA update, you’ll need to access Fastboot Mode .
Press and hold the Volume Up button and the Power button simultaneously. How to Open Fastboot Mode on REALME C12
adb devices (If your device shows “unauthorized,” check your phone and allow USB debugging access.) If you own a REALME C12 and are
Power off your REALME C12 completely. Wait 10 seconds to ensure it’s fully shut down. flash a custom recovery (like TWRP)