Open a command prompt/terminal in your ADB folder.
You should now see the Fastboot screen (usually a dark screen with small white text listing your device’s serial number and partition info). This is the easiest method for users who already have USB Debugging enabled. How to Open Fastboot Mode on REALME C12
Unlike Recovery Mode (which handles resets and updates from a file), Fastboot Mode allows you to communicate directly with your device’s hardware via a PC. This guide will walk you through three reliable methods to boot your REALME C12 into Fastboot Mode. Fastboot commands can permanently modify your device. Proceed only if you understand the risks. This process may void your warranty and wipe your data. Method 1: The Hardware Key Combo (No PC Required) This is the fastest method if your phone is powered off. Open a command prompt/terminal in your ADB folder
Press and hold the Volume Up button and the Power button simultaneously. Unlike Recovery Mode (which handles resets and updates
Use the Volume Down button to navigate the menu and select “Fastboot Mode” . Press the Power button to confirm.
Type the following command and press Enter: