Oppo A37fw Pattern Unlock 100% Done By Inferno Tools 38 Sohan Telecom July 23, 2018 at 7:08 pm (last edited August 29, 2018 at 2:19 pm) 622 DO YOU HAVE Volcano Box Inferno Uni Tool THEN DO THE PROCESS Turn Off then connect USB Cable.. phone, hold VOL UP and DOWN, click on Format