While Oppo stopped updates in 2022, the custom ROM community backports security patches. You could be running a ROM with a June 2026 patch level, keeping your financial data and login credentials safe.
Step 1: Unlock the Bootloader (The Hard Part)
Step 2: Install a Custom Recovery (TWRP) Oppo A9 Custom Rom
Step 3: Prepare the GSI
Step 4: Flash the ROM
Step 5: Post-Installation Fixes
The Oppo A9 is not developer-friendly. You will not find a CyanogenMod (LineageOS) nightly like on a Samsung or Xiaomi. However, Project Treble saved this phone from total obsolescence. With patience and the right GSI, you can temporarily resurrect your A9. While Oppo stopped updates in 2022, the custom
Before flashing, visit: XDA Developers Forum > Oppo A9 (Codename: Oppo Realme 5 family – they share hardware) and search for "GSI Treble Guide."
Custom ROMs for the Oppo A9 are a labor of love, not a guarantee. Proceed with caution, or simply sell the A9 and buy a Xiaomi or Pixel for a proper modding experience. Rebuilding kernel:
Have you successfully flashed a custom ROM on your Oppo A9? Share your experience (and your working patches) in the comments below.