Thank you for your quick answer. Kind of mysterious... I tried to calibrate the compass and as soon i press the calibration button it starts to vibrate and says calibration success, no Fig 8 movement possible, too quick. Restarted the phone, then no calibration possible whether in system app nor with MobiWia. Restart again, calibrationtime is very short again with success, but shows wrong direction. 3x calibration, 3x different directions. What now? MobiWia couldn't find & show any sensors, after the restart again, all worked inkl. calibration. Will give the navigation a try and see if it works flawless. Do you think hardware or software?