First, ensure your phone has at least 50% battery life. A sudden shutdown during the process could interrupt critical operations. Second, back up all essential data, including photos, contacts, and documents, because entering Fastboot mode and performing certain operations carries the risk of data loss. Third, you will need to enable Developer Options and USB Debugging, which are hidden by default on Oppo phones. To activate Developer Options, go to and tap Build Number seven to ten times until a message confirms that Developer Options have been turned on. Then navigate to Settings → Additional Settings → Developer Options and toggle on USB Debugging . This is mandatory for using the command-line methods and for any computer to communicate with your phone.