This is how to attach a smartphone to the DJI Phantom 3 controller. I demonstrate using the iPod Touch model listed below and also the iPhone 6 Plus. I had the devices upside down on purpose, in case e-mails and messages came through while filming the video. Don't feel bad if this confused you too!
This is how to perform the DJI Phantom 3 IMU Calibration within the DJI Go App. Many people were unable to find the "calibrate IMU" option within the DJI GO App but there is where to find it. I calibrate my DJI Phantom 3's IMU after every firmware update. From my experience, performing a Phantom