I wonder which Android phone they were using. Edit: Disregard. I just got my answer in the very same article I linked to. It is “believed to be a variant of the Samsung Galaxy Note.”
The source of the reveal—yet to be officially confirmed by the US Army—had the following to say about that device:
When trying to run a split screen showing the route and UAS feed, the Android smart phone will freeze up and fail to refresh properly and often have to be restarted, a process that wastes valuable minutes. It’s seamless on the iPhone. The graphics are clear, unbelievable.