The orientation of your mobile device can also affect Active Track's performance.
If you are using the DJI GO app, then Active Track will be able to track your mobile device in its horizontal orientation. If you want to change the direction that the drone is facing, move your mobile device accordingly.
If you are using the DJI GO app, then Active Track will be able to track and follow your mobile device even when it is tilted approximately 45 degrees from level (from either side). If you want to change the speed of your drone during this time period, tilt or rotate your mobile device accordingly.