A:AnswerThe WIFI is only used as the connection to your phone. You don’t have to have a connection to a router or anything else with data. All you need is the phone for a controller.
A:AnswerMine came with a battery, extra props and prop guards. I do recommend getting another battery though as they only last about 8-10 minutes before needing to recharge.
A:AnswerNo, it doesn't have a follow me feature by default/design. However, someone has made an Android app that lets you do that, which you need to purchase.