All I can say, I spent six weeks attempting to get a Samsung Galaxy 3 cellphone, a Samsung Tab 3 and a Samsung Tab 4 both 7" to work properly with the DJI App. The cellphone finally worked when I removed every app and other whistles and bells from it and had no phone service, placed in it the airplane mode w. wi-fi scan off. But the screen is so small. The Samsung Tablets never worked properly. FPV dropped every 30+ seconds and had to be reset. I did both TX and wi-fi antenna mods and it did not help with the Samsungs.
I am using a GOOGLE Nexus 7" by Asus, it works perfect with my P2V+!