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USA
National GSM Coverage
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AT&T Coverage Map (formerly Cingular)
Link to interactive AT&T wireless Coverage Viewer
T-Mobile Coverage Map
This national wireless coverage map shows the locations you may use you a digital GSM wireless cellular phone within the USA. You must have a 1900 MHZ GSM phone (850 MHZ is recommended for roaming) and a sim card with a service provider that has roaming agreements with USA GSM carriers. Because an area is shaded does not necessarily mean that there is complete cellular coverage; in fact, there are "no coverage" areas (including areas too small to depict) within the shaded areas. Wireless service is a radio technology that is subject to transmission limitations caused by service area limitations (such as cell site availability), customer equipment or its installation, as well as weather, atmospheric, magnetic, environmental, topographic and other like conditions. In addition, service may be temporarily limited or suspended due to system capacity limitations or system repairs or modifications. |