Which mobile phone company has the fastest internet?

I am about to switch mobile phone company, and would like to have the fastest internet on my phone.





I am also considering between iPhone or staying with Blackberry.





Any suggestions as to what is the best combination?





I have available in my area (Florida), Tmobile, Cingular/At%26amp;t, Sprint, MetroPCS and Verizon (I think )





Thanks.|||Go with Verizon they have the best service as well as data