A AT&T, Verizon Wireless, Sprint, T-Mobile, U.S. Cellular, Boost Mobile, MetroPCS, Virgin Mobile, Alaska Communications Systems (ACS), Appalachian Wireless (EKN), Bluegrass Cellular, Cellular One of East Central, IL (ECIT), Cellular One of Northeast Pennsylvania, Cricket, Coral Wireless (Mobi PCS), COX, Cross, Element Mobile (Flat Wireless), Epic Touch (Elkhart Telephone), GCI, Golden State, Hawkeye (Chat Mobility), Hawkeye (NW Missouri), Illinois Valley Cellular, Inland Cellular, iWireless (Iowa Wireless), Keystone Wireless (Immix Wireless/PC Man), Mosaic (fusionada o CTC Telecom), Nex-Tech Wireless, NTelos, Panhandle Communications, Pioneer, Plateau (Texas RSA 3 Ltd), Revol, RINA, Simmetry (TMP Corporation), Thumb Cellular, Union Wireless, United Wireless, Viaero Wireless, y West Central (WCC o 5 Star Wireless).
Los proveedores no son responsables del retraso en el envío de mensajes ni de los mensajes no entregados.