While ColorOS 11 (based on Android 11) was stable, Oppo abandoned the A91 shortly after. There is no Android 12, 13, or 14. Security patches are ancient. The phone feels sluggish, bloated, and frankly, outdated.

A custom ROM fixes all of this.

Users who want customizability without crashes. crDroid is the gold standard for MediaTek devices. Based on LineageOS, it offers deep customization (status bar tweaks, lock screen clocks, gestures) while retaining rock-solid stability.