Which mobile carrier is the best?

I had AT&T before with an iPhone 3g, and I loved the service. Fast, no glitch, except it was a bit pricey.

Now, I transfered to Tmobile, internet is slow, text is slow, phones are not as good. And almost as pricey as AT&T.

So, between those two I'd choose AT&T, right?

However, I haven't tried other carrier's such as Verizon, or Sprint.

Which carriers have nice phones and really great service?

I think I'd want an iPhone now after these phones I had… But i want to research a bit more.

You don't get service anywhere with version and sprint is like tmobile

Verizon is more expensive than AT&T so since you said you AT&T was pricey, stay away from Verizon. Sprint is horrible, They might have unlimited data but I recommend you stay away from them. When the iPhone 4s came out I changed from tmobile to Sprint and 2 days later I had to change it because the reception was horrible. I live in NYC and I was supposed to have the best coverage according to their coverage map, but I didn't. Texts took forever to get to my friends and they would receive texts 2 and 3 times, This also happens to my friends that have sprint. Now I have AT&T and I get reception everywhere I go, So out of the 4 major carriers, in my opinion AT&T is the best for the price.