Hi, I have a Sheffield 7 inch tablet model PL7117. It is locked out with a "too many pattern attempts" I cant enter my account details because wifi is not enabled. And the device does not have usb enabled either.. I was wanting to do a factory reset on this device but no matter what combination of buttons i press I am unable to get to the recovery section during reboot. Does any one here have any idea what the key combinations are to access recovery on this device. Thanks in advance.