Hey Oppo A9 users!
Development for these ROMs on the Oppo A9 was scarce. If found, they were almost certainly based on the same device trees as the LineageOS builds, inheriting the same bugs. Oppo A9 Custom Rom
Installing a custom ROM on the Oppo A9 (2020) is a high-risk, high-reward process that allows you to bypass the limitations of its now-unsupported ColorOS Hey Oppo A9 users
He held the Power button and the Volume Down button. The screen flashed black, then the Oppo logo appeared. He let go. Installing a custom ROM on the Oppo A9
: Sync photos, contacts, and files to the cloud or a PC, as your device will be factory reset [7]. Battery Check : Ensure your phone has at least 60% charge to prevent it from dying mid-flash [7]. Tools for PC : Download and install the latest Android SDK Platform-Tools (ADB and Fastboot) for your computer [14]. : Install the Oppo USB drivers so your computer can recognize the device [10]. Phase 2: Unlocking the Bootloader