Depends on the area of coverage, it could be Sprint, AT&T, Verizon, or T-Mobile. Technically, AT&T is the amongst the fastest currently (along with Sprint WiMa

Depends on the area of coverage, it could be Sprint, AT&T, Verizon, or T-Mobile. Technically, AT&T is the amongst the fastest currently (along with Sprint WiMax and T-Mobile HSPA, where available), but I've been both in areas where its much faster than Verizon and areas where its been much slower than Verizon. T-Mobile has pretty limited coverage areas, but they're rolling out HSPA. If you're in an HSPA-covered area of theirs, that may be your best bet. If you're in a Sprint WiMax-covered area, Sprint may be your fastest bet. Summary: It depends on your coverage area and congestion levels.