I live in an area that has big problems in cell phone reception (rural). I’ve read that Apple is expanding to include Verizon. I don’t mind the blackouts, but I would like a navigational system. (I am completely new at this)
You really need the 3G model for Navigation, but the iPhone 4G does that very well. I have the iPhone 4G and the 3G iPad, be glad to help if needed. Love both of them. There is a free App for the iPad that will let you do text messaging, includes an actual phone number for your phone friends, called TextFree. It does have some annoying adds, but cheap to turn them off, look for them to offer phone calls soon as well. Lot of creative people out there that try to wring every last useful byte out of their purchase.
I believe Navigon works without a 3G connection...