Is it possible? I've never even thought about trying it until yesterday. I went to fly and each time I tried to calibrate the compass, the app would disconnect. I've never had this happen before. The disconnect occurred each time during the nose down part of the calibration. It did it several times. Weird! It was just the app though. The controller displayed normal data except for the "app disconnected" message at the bottom. After restarting everything, I was able to fly without any issue. I flew two flights and the XSP landed (RTH) itself within a foot of its takeoff point for both. I know the XSP can be flown without a tablet or phone. That's at least one reason for having the small screen on the controller so... the compass must be able to be calibrated as well right? I've just never attempted or thought about it before. If I encounter this issue again I may have to contact Autel about service but, I thought someone here might know something about this.