(1) there would be no WiFi, (2) GPS, (3) a gig a verizon bloatware, (4) slooow network speeds, and (5)you would be getting a hell of alot less for more money.
Ok.
1. There's no wifi when I'm out & about talking on a cellphone. Downloading an email while I'm talking on the cell network? No, AT&T is right, verizon can't do that, but guess what, in the few years I've had an iphone, AT&T hasn't been able to either.
2. That super handy GPS that traces your little blue dot out into mapless space as soon as you get out of town, and cell reception fades? Like, where you'd actually need GPS? What a loss.
3. Do you really think Apple would allow Verizon to pile a gig of its own bloatware on the iPhone?
4. Slower than the Edge network we're on 90% of the time anyway? Actually, by pulling over a considerable amount of potential customers from AT&T, AT&Ts network would improve... wait, make that, get worse slightly more slowly. & Apple would likely require V to meet capacity requirements with system upgrades to ensure a quality experience, having learned the hard way from AT&T, that cell companies here will do as little as technically possible in terms of actually providing the services people are paying for.
5. Getting a hell of lot less what? Frankly, I could use a plan that gave me less. A $15 a month data plan and $15 a month of minutes at their going rate would be more than plenty.