data networks are deployed just like cell networks, and data networks basically work on cellular technology; notable, the cell site.
when cell phones were still analog, the rolled out digital spread spectrum technologies. that didnt cover all areas right away (and still doesnt), because they needed to deploy the equipment to handle the signaling.
with data networks, they have to also get a broadband backhaul to cell sites that will allow data transfer, that means T1/T3/ISDN/whatever else you can think of.
if the availability of the data network is the problem, then your problem is with cell phone topologies, not with the iphone itself.
that being said, i understand that an iphone isnt all cherry. nothing in the world is, technology, cars, people, water, paper, pictures, speakers, door handles, boxes, pens, pencils, tires, car wax, baby seats, sex, shoes, sports, staplers bank accounts bags, books, nothing.