Right now I'm looking to upgrade my DJI Phantom Vision 2 with some of the parts that can be purchased throught the website, but I need a little bit of help. I currently use my Vision 2 with the basic remote and my iPhone.  I am looking to get some parts that can extend the range, right now with my iPhone, on a good day, I can get to about 800 feet away before I lose connection to the camera. So I am wondering what parts can I order to extend the range and how it will work.
I also have a Canon Rebel T3i and I was wondering if there are any gimbals that are compatible with it.
Thanks for the help!

Check out Lightbridge. I doubt the Phantom can carry the weight of the Rebel for long, DJI does make a setup that will carry it for the larger S models though.