Okay, hope this isn't repeating a subject, but I searched without any hits. My brother is an idiot. He bought 3 phantoms at $750. Never flew one himself, treats me like his nerd slave. I fly them and crash them constantly (lots of trees here, but less so now), but anyway, now he bought a vision. And he needs a cheap tablet or smartphone to control the video. I am fairly tech, but don't own a smartphone or wifi tablet. He rarely even plugs in his land line phone. What is compatible with the dji vision video app that I can buy for him that doesn't involve a contract for phone service? Are there compatible smartphones without service contracts, WiFi tablets, or anything that gives all the functionality required? I know that WiFi iOS and android systems are compatible, but I need a somewhat cheap, non-contract device that will give him all the functionality (altitude, speed, video settings, location maps, etc.) without the overhead of service contracts. Thanks alot.