The most immediate benefit of a custom ROM on the OPPO A91 is a dramatic performance improvement. ColorOS, while feature-rich, is notoriously heavy. Background processes, aggressive RAM management, and UI animations consume resources that could be better used for your apps. Custom ROMs such as LineageOS, Pixel Experience, or crDroid are built on AOSP (Android Open Source Project) and are remarkably lean.
By stripping away unnecessary services, a custom ROM can make the Helio P70 feel snappier. App launch times decrease, scrolling becomes smoother, and the dreaded “jank” that appears after months of use virtually disappears. Users often report that an A91 running a lightweight Android 13 or 14-based ROM feels faster than it did on its original Android 9 or 10 firmware. The phone’s 8GB of RAM is finally allowed to work efficiently without being constantly occupied by background telemetry and vendor services. oppo a91 custom rom better
No – unless you are an experienced enthusiast who: The most immediate benefit of a custom ROM
For normal users: Stay on stock ColorOS 11, debloat via ADB (remove Oppo’s useless apps), and install a third-party launcher like Lawnchair. That gives 90% of the “clean” experience without losing fingerprint, camera, or charging speed. Install a custom recovery (TWRP):
If you still want to try, search XDA Forums for “Oppo A91 GSI” – look for Android 13 Treble GSIs by phhusson or AndyYan. But expect a downgrade in daily usability.