You’ve heard of AT&T, the mobile giant that sports the fastest network in the industry. But you may not have heard of H2O Wireless, FreeUp Mobile, and the eight other mobile virtual network operators (MVNOs) that use AT&T’s network to support their prepaid service.
MVNOs cut deals with the major cellular networks—AT&T, Verizon, and T-Mobile—to use their cellular towers. This means a prepaid SIM card can get you virtually the same coverage as a traditional plan (but your data speeds may be slower).