Last year, AT&T Wireless announced that it was switching from it TDMA-based network to a GSM-based network. The company is using this GSM network as a base on which it will build its next-generation wireless services.
AT&T Wireless makes the US’ first UMTS voice call
AT&T Wireless and Ericsson have successfully completed the first 3G UMTS voice call in the US. The successful testing of Ericsson's network equipment implies that AT&T Wireless will be able to deliver 3G services in the US on schedule.
