no such thing. Your iphone can only communicate through wifi. There isn't a choice in the matter until Apple allows the bluetooth stack to do more than connect to a headset. SnatchTest is a free solution that works well. You keep a server program running on your computer and your iphone connects to that. You won't actually need internet for it. You just need your computer to create a wifi signal then connect your iphone to that. Personally I use Jaadu