In Recovery Mode, use the Volume buttons to navigate and the Power button to select.
You may need to type yes to confirm (using the on-screen keyboard). How to Hard Reset OPPO F3
Open the Settings app. Step 2: Scroll down and tap Additional Settings . Step 3: Tap Backup and Reset (sometimes labeled "Reset Phone"). Step 4: Tap Erase All Data (Factory Reset) . Step 5: Tap Reset Phone or Reset Settings . Step 6: If prompted, enter your lock screen password or pattern. Step 7: Tap Erase All Data to confirm. In Recovery Mode, use the Volume buttons to
Navigate to Wipe data (Keep SMS/Contacts) or Format data – select Format data for a full hard reset. In Recovery Mode
Navigate to Wipe data and press the Power button.