I can pair my iPhone 4 with my Bluetooth headset but my brother and I are trying to pair our iPhone 4s via Bluetooth and it just stays on the connecting screen never connecting. My daughters phone (not an iphone) will find it and send a pairing code, but I accept (can't enter the code) so it never pairs. Does the iPhone pair with another phone via Bluetooth? What's the trick? Oris this hopeless?