Phantom regular status on the ground but after takeoff starts blinking red LED, battery full charged. I've done all kinds of calibration methods, IMU and compass, and reset the magnet and nothing worked until now. The MOD Compass is between 1600 and 2000 but the calibration is finished ok. The calibration method by stick also ends ok, without led red. Just after takeoff the problem happens. Besides flashing the red LED, the flight becomes unstable and automatic landing happens. I think the problem is in compass, anyone else had this problem? Buy another compass (Landing gear) solves the problem?