Techs & Trends
Ref F vs Rev E
Verizon and AT&T are big and expensive... BUT for the most part have good signal and I've had good luck with both on customer service personally.
Sprint had a few bad years and has a smaller network... but has really good prices for smartphones that, in my opinion, beat T-Mobile while having a much better network AND free roaming on #1 network.
T-Mobile has some interesting price options but a very crap network where I am. Why would you refuse good networks and settle on turd #4?
So as far as I can tell, roaming is allowed on Verizons network.
I have read elsewhere that data roaming is alot more "limited" than minutes. I've seen mention of 300mb/month, but I don't see anything offical from my limited searching.
I'd search more... but *cough* I'm working so dilligently *cough*
with that being said... go for an Android phone, they have the better web browsing capabilities.