The device may already be on the latest supported version (Android 11), as newer ColorOS 13/14 versions are reserved for newer flagship and A-series models Stability:
Checking for an update is straightforward and can be done directly from your phone's settings: oppo cph1933 ota update
: Scroll down and select Software Update (or System Updates ). The device may already be on the latest
Power off the phone, then hold to enter Recovery Mode . oppo cph1933 ota update