I received my A81-E last night from Merimobiles. Then i did a really stupid thing. I messed up the screen calibration, and its basically impossible to use the device. I found a thread with the same issue, and he said a flash of the firmware fixed it. I have tried a few times to flash the firmware, but I'm getting different methods from different places. Could someone post me step by step instructions to flash the FW. Thanks in advance.