Note: Availability depends on the specific region variant of your phone. Always verify compatibility on XDA Developers Forums.

While 20W charging works, OPPO’s proprietary VOOC 3.0 (30W) relies on kernel-level drivers. On custom ROMs, you may only get 10W-15W charging. A full charge takes 90 minutes instead of 60.

Stock ColorOS has heavy UI rendering. Custom ROMs strip away OPPO’s "HyperBoost" gimmicks and replace them with AOSP’s simple rendering engine. Apps open 30% faster.

Oppo A91 Custom Rom Better May 2026

Note: Availability depends on the specific region variant of your phone. Always verify compatibility on XDA Developers Forums.

While 20W charging works, OPPO’s proprietary VOOC 3.0 (30W) relies on kernel-level drivers. On custom ROMs, you may only get 10W-15W charging. A full charge takes 90 minutes instead of 60. oppo a91 custom rom better

Stock ColorOS has heavy UI rendering. Custom ROMs strip away OPPO’s "HyperBoost" gimmicks and replace them with AOSP’s simple rendering engine. Apps open 30% faster. Note: Availability depends on the specific region variant