August
Premium Account
Open mtk client tool, select vivo, y91c, safe format (para), start,hold volume up and down, connect phone, release vol up and down pag naread na. Antayin matapos then i on unit, setup Hanggang sa frp then off ulit, select erase frp, start, hold volume up and down, connect, release after readth, at antayin nalang. Done!