Verizon's entire network is 3g and exponentially more reliable than AT&T could even dream their network to be. AT&T has a larger overall network than Verizon but the bulk majority of it is 2g, Verizon's 3g network embarrasses AT&T's. To add insult to injury the iPhone's don't do well holding service when jumping between 2g and 3g which leads to almost all of the dropped calls. You'll have dropped calls on Verizon but it will only be because you completely dropped coverage or you are talking to a friend on AT&T. I have services for both companies (work and personal) and I want to throw my AT&T phone out the window more often than not. I've taken business calls on my Verizon phone because I'm sick of dropped calls. Driving around in Austin, TX or Dallas, TX you'll be lucky to have less than a dozen dropped calls per 60 minutes of talk time on AT&T iPhone.