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Our Mobile Broadband and GSM Technology

better technology for today and tomorrow

GSM (Global System for Mobile Communications) is the world's most popular wireless phone technology. It's used by more than one billion people around the world.

At AT&T, we offer a nationwide GSM/GPRS footprint across 100 percent of our service area.


GSM offers unparalleled global roaming capabilities, as well as the truest voice quality in wireless. Its easy-to-use data capabilities offer service up to the fastest wireless broadband service currently possible.


There are several technologies that companies use to provide wireless services. While there may never be one standard technology worldwide, GSM is now used in 219 countries and territories serving more than three billion people and providing travelers with access to mobile services wherever they go.

Levels of Service

When combined with enhanced backhaul, our HSPA+ technology is expected to deliver speeds up to 4x faster than ordinary mobile broadband. Learn more at

Enhancement of UMTS with HSPA (High-Speed Packet Access) moves GSM into the range of true broadband service.

UMTS (Universal Mobile Telephone Service) is the next level of service. It is the leading 3G technology choice today, offering potential worldwide coverage. UMTS enables vertical-specific devices (an X-ray viewer, for example), video and music on-demand, digital TV and radio, and services such as home or business security video monitoring.

Further enhancements in data capability over the GSM network are provided with EDGE service (Enhanced Data rates for GSM Evolution). EDGE is especially important to business users as it permits mobile access to corporate applications at speeds far in excess of dialup. True wireless broadband service is being deployed in both GSM and CDMA worlds, but AT&T's existing nationwide offering of EDGE/Wi-Fi service makes corporate users truly mobile using either a wireless-enabled Windows Mobile® device, or any of a host of other new devices.

GPRS (General Packet Radio Service) is the first level of data service on GSM. This packet-based service utilizes the GSM Radio Access Network, combined with a core network dedicated to data. GPRS allows nationwide text and email service and basic WAP (Wireless Application Protocol) Internet browsing. GPRS is the service of choice for many quick messaging phones and smartphones.

Additionally, unlike other wireless technologies, HSPA+, HSPA, and UMTS offer you the ability to make simultaneous voice and data calls. This flexibility lets you use the same phone to speak with someone while also accessing Internet information.

Visit our Network News page to learn more about the nation's fastest mobile broadband network.

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