, many users find it impossible to apply a full custom ROM through standard methods. The Alternative: If you can't find a dedicated ROM, many users opt for GSI (Generic System Images)
Increased vulnerability to modern threats. oppo a91 custom rom better
: Best for those who want the look and feel of a Google Pixel phone. OPPO A91 - better than a working class phone - GadgetGuy , many users find it impossible to apply