The Phantom 3 IMU calibration procedure is simple and takes between 5 and 10 minutes. The IMU calibration will fix most of the Phantom 3 issues including erratic flying, no signal and compass errors.
The IMU calibration will fix excessive warm up times, off horizon viewing issues and the usual yellow and red flashing lights after completing the normal Phantom 3 compass calibration. This post shows you how to calibrate the IMU on the Phantom 3 along with some tips.
While the Phantom 3 is great value and a beautiful quadcopter, a crashed quadcopter is of no value. Take a few minutes to examine your quadcopter components before flying. Make sure the motors and props are running freely and that there is no sign of any physical damage.