When this happens, a (also known as a Factory Reset or Master Reset) is often the ultimate solution.
The phone will take longer than usual to restart (up to 5 minutes). Do not press any buttons. You will then see the Android setup screen. How to Hard Reset OPPO F11
The reset process takes time. If your phone dies halfway through the process, you could corrupt the system software, turning your device into a "brick." Ensure your OPPO F11 has at least before proceeding. When this happens, a (also known as a
OPPO devices run on Android, which utilizes Factory Reset Protection (FRP). This is a security feature designed to prevent thieves from using a stolen phone. If you hard reset the phone, you will be asked to sign in with the Google account previously synced on the device. If you do not know the email or password, , as you will be locked out permanently. You will then see the Android setup screen
Absolutely—if you have the right reasons.