HI everyone, I have been in search of an arrangement that would allow one to work with the I Phone 5 when there is no service available. More specifically, if say one is out in the middle of no place, and may not necessarily be on a street or road. I have an old RBT-2000 receiver from when I had Trekker, and I'm just wondering if there is an app for this, and what luck people have had with sinking the Bluetooth RBT-2000 to the phone?