The specific Avvio L640 Claro Firmware comes with a Stock ROM of Avvio L640 Claro. This helps you to bypass FRP lock and revert form root and custom ROM. Why would you want to flash Firmware on your Avvio L640 Claro? There are various reasons to flash (Firmware on Avvio L640 Claro). For instance, if your phone gets stuck …