Download the official Oppo A37m firmware (Stock ROM) matching your device's exact build number. Launch SP Flash Tool: Open the application on your PC.
Remember, the best time to back up your data was yesterday. The second-best time is now. oppo a37m userdata
Hold the and Volume Down buttons simultaneously on your phone. Download the official Oppo A37m firmware (Stock ROM)
Click the green Download button in the top menu. Connect Device: Turn off the oppo a37m userdata
Deleting or corrupting this partition results in a "factory reset" state, but it can also cause a userdata size mismatch error during flashing.
Over time, accumulated cache and leftover app data can slow down your phone. Try the following: