Hi guys, i'm about to buy a Phantom Vision DJI, the thing is last week my cellphone broke and I wasn't planning on getting any smartphone soon, i'm using a really old phone now, the thing is I wanna buy the cheapest smartphone to use it with the drone, since for communications i'll most likely keep the one i have,  what cheap phone would you recommend?

Have you a tablet you can use? I have a galaxy s5 smartphone and very happy with that for the job, am sure you could get a very decent Samsung with a decent size screen like the s4 and 2nd hand am sure you would have plenty to choose from.

Noup, i've got no device like tablet/smartphone that could run the app, that's why im looking for the chepeast option, i was suprised the app wasn't available for PC

Any half decent quad core android tablet using version 4.x.x should be good to go.  You can pick up a bargain on eBay.