Verizon has no UMTS; besides, they don't offer any unlimited plans anyways. I really can't understand why would anyone sign up with any carrier other than T-Mobile in the US (or possibly StraightTalk, if you don't care about violating their T&C), because no other carrier has 4G speeds and overage-free access anyways.
What's the point of having slightly higher speeds than T-Mo, but with a 2GB limit, if you have to pay 100$ for it, and would still be charged overage fees if you go over?
I'm happy with my 5GB@4G @ 30$/30days T-Mo plan, with free tethering and no overages! Google Galaxy Nexus (e.g. HSPA+ Nexus 3) is still pretty cool, too. Won't be switching to Verizon any time soon!
, it comes down to coverage. T-Mobile lags a lot in uniform coverage in their markets.
In my city, Cleveland, Ohio... T-Mobile coverage is trash. The only choices I have are Verizon, AT&T, and Sprint. I have Verizon right now with a grandfathered Unlimited Data Plan. AT&T'? Not just no but hell no. And Sprint is just as bad as T-Mobile in my area.--
Boycott AT&T uVerse! | Tom's Android Blog | AOKP (The Android Open Kang Project)