To install any custom ROM, you will need to unlock the bootloader, install a custom recovery (like TWRP), and root the device. The phrase "Top ROM" implies a ROM that is lightweight, stable, and optimized for daily use.
Some developers have created unofficial ports of higher Android versions (even up to Android 11) for the A37f. rom oppo a37f android 60 top
file for your model, move it to your device, and use TWRP to install it. Important Considerations Please update my phone oppo a37f to android version 6 To install any custom ROM, you will need