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Development Best Practices for Video Streaming over the AT&T Mobile Network
EDGE, like GSM/GPRS, is a time division multiple access technology. The Universal Mobile Telecommunications System (UMTS), which uses a wideband CDMA (WCDMA) radio interface, is a third-generation wireless technology.
AT&T, like most GSM operators worldwide, operates both UMTS and GSM/GPRS/EDGE networks as an integrated network. Many UMTS devices can roam between UMTS and GSM/GPRS/EDGE networks.