It's not the device. As you can see in the video attached, it is the controller that does not connect to the drone/or when it does it does briefly and then disconnects again. Definitely not the device...Which phone/tablet device are you connecting the controller to? Have three iPhones, a 6plus a 6splus and an XR. I find the XR gets the best connectivity and distance and was shocked at how quickly the 6plus loses the connection. I would have thought it was entirely dependent on the controller, but obviously not.