Coverage not available everywhere. Sprint 4G network: Reaches over 35 markets and counting, on select devices. Sprint 3G network: Reaches over 262 million people. See sprint.com for details. Not all services avail. on 4G and coverage may default to 3G/separate network where 4G unavailable. PC World's test included Sprint, AT&T, Verizon and T-Mobile in thirteen major cities in all regions of the country during December 2009 & January 2010. In all, roughly 9,000 individual tests of Sprint's 3G service were conducted from 280 testing locations in 13 cities. Testing sessions were one minute in duration per location, and network performance can be highly variable from neighborhood to neighborhood. In laptop-based tests, Sprint tied with another carrier for first in 3G network reliability.