Same problem on a M009F.
30 pin USB and M009F_key_v4.2 written on board.
I had problems with wifi, flashed it with latest firmware from eken (android 2.3.3), restart, I can see the android desktop for a second, and appears the calibration screen.
I point the 5 crossairs and : "try once again" and again and again.........
I have tried and older firmware (Android 2.2) whith the same problem, so I think it could be a hardware problem.
After reading forums I think the only solution is that someone makes a backup of his tablet (Kernel version 18.104.22.168. Build Number GRI40 Hardware 0.2.3.3) with the calibration screen passed
, and send it to me. Can anyone help me??
Thank in advance