Oppo A91 Custom Rom Better -

You'll need to unlock the bootloader via unofficial MTK tools (risk of bricking). If successful, try:

For privacy-conscious users, custom ROMs are a revelation. Many stock OEMs collect usage statistics, diagnostic data, and even location history with minimal transparency. While OPPO is not the worst offender, it still sends data to its servers. Custom ROMs, especially those with privacy focuses like GrapheneOS (if ported) or /e/OS, eliminate this telemetry. You regain control over what leaves your device. Features like network access per app, permission monitoring, and spoofed location data become readily available. oppo a91 custom rom better

(also known as the ), upgrading to a custom ROM is a journey with a massive catch: Oppo's bootloader lock You'll need to unlock the bootloader via unofficial