Always optimize your OPPO device when there's the latest software update available to enhance the system stability of your device. To check if there's a system update available for your device, go to [Settings] > [Software update].
Once your phone can update to the latest version, choose the OPPO phone model on the list as categorized according to their series. It will also give the firmware information update like the version number, size, update date, download times, some notes on what's the update about, and the list of previous versions.
If you don't know how to download and update the software version, there's a simple guide to help you out!
However, the Android 11 update on your phone is currently unavailable. Our team is working on this and will make it available soon. Please stay tuned!