I received the add on for the UAT. Very easy to install, can’t really do it wrong. There is a video along with written instructions on the whole installation. I’ve downloaded the files, followed the instructions and tried to get a complete download 4 times with no success. I am using a IPad, which the video says is acceptable. Has anyone had success with an Apple phone or iPad, I tried both? UAvionics said if I took the unit out and sent it to them they would do it for me. The problem is the airplane is built around the unit and it is hard to get to. Any ideas. Thanks