Open MRT 3.71 tool in your PC.
-Tap on “Oppo” tab from mrt tool.
-Select “Format [Unlock]” option.
-Select model number “A12”.
-Now click to “START” button to Bypass frp Oppo A12 and Remove Pattern Lock.
-Come to the device, Power Off>> Press and hold Volume Up + Down button + Insert USB Cable to Phone.
-Phone unlocking process will start and will take couple of minutes to remove Oppo A12 pattern lock or Pin lock including Oppo FRP lock.
-All done!!! Device will reboot and you have to setup the device again as a new device.
– For FRP click on Erase FRP option and repeat the process again.
