As of March 2015, AT&T and Verizon have the overall best cellphone coverage in the United States, but the exact carrier will depend on a person's specific location. Customers in search of a cell phone plan can find out the ones with the best coverage for their area by searching sites, such as RootMetrics.
While AT&T and Verizon are considered to have the most expansive networks, other carriers have increased their coverage. In addition, several carriers use AT&T's and Verizon's network to provide high coverage at a low cost. For example, Cricket is owned by AT&T and uses its cell towers. Straight Talk Wireless uses the networks of the four major carriers, depending on the phone and location.