Before looking into custom ROMs, ensure you are running the latest official version of Funtouch OS. Official updates provide the best system stability and bug fixes. www.vivo.com Latest Firmware Official Vivo Support Page provides the PD2044F_EX_A_6.78.15 update for the Y51. How to Update : Navigate to System Update
Once you have a custom ROM installed, updating to a newer version is easier: vivo y51 custom rom upd
