This is a simple question and I'm sure it's been addressed but I can't find it. I'm going to buy a new Ipad Mini 4 64 gb but I have no need for the cellular model and don't really want to spend the money for it. However, I don't think the non cellular (wifi only) models have built in gps. That won't matter will it? The GPS signal comes from the bird thru wifi? Correct?