Ive been wanting to recalibrate my compass, but for some reason my phantom 2 will not go into calibration mode, no matter how many times you flip the S1 switch and no matter how fast you flick the switch. Has anyone else had this same problem and if so how where you able to get it to go into compass calibration mode. Also I have the IOC turned on, so the S1 switch is programed to (GPS, ATTI, FAIL SAFE) don't know if that makes a difference. If you think connecting it to the assistant software will make it go into calibration mode, then I can't. My P2 won't connect to my MAC assistant software (haven't tried a PC cause I don't own one) but that is a different problem that has been addressed on a different form on this site.