: Flashing official firmware will erase all user data .
: Click the Start button (play icon) in the tool. Connect Device : Turn off your Realme C21-Y completely. Realme C21-Y RMX3263 Firmware Official Unbrick,...
: Always use firmware that matches your region and is at least the same or a higher version than currently installed to prevent security-related bricks. Resources : Flashing official firmware will erase all user data