Ive been using my phantom for about two weeks now. However, I only fly it in atti or manual mode since I cant ever get the compass calibration and GPS to work. As soon as I plug in the battery, it does the initial checks which are good but it never does the warmup sequence (blinking yellow light). It goes straight to green, then 3 red blinks which is indicative of poor satellite reception this goes on for a while and never improves. So now I start the compass calibration by the book, flick the mode switch 10 times to get the yellow light then horizontal 360 then green light vertical 360 LED side up. All i ever get is a continuous blinking red (a failure in calibration/battery low). But my batteries are fresh. Upgraded to the 4.02 update with same results. Any insight on what the problem could be? Anyway, thats my story. I still love flyin my phantom though. But it would be nice to fly with the GPS mode features.