Sunset For D-AMPS in The US and Canada
AT&T Mobility, the largest US carrier to support D-AMPS (which it refers to as "TDMA"), had turned down its existing network in order to release the spectrum to its GSM and UMTS platforms in 19 wireless markets, which started on May 30, 2007, with other areas that followed in June and July. The TDMA network in these markets operated on the 1900 MHz frequency and did not coexist with an AMPS network. Service on the remaining 850 MHz TDMA markets was discontinued along with AMPS service on February 18, 2008, except for in areas where service was provided by Dobson Communications. The Dobson TDMA and AMPS network was shut down March 1, 2008.
On May 31, 2007 Rogers Wireless decommissioned its D-AMPS and AMPS networks and moved the remaining customers on these older networks onto its GSM network.
Alltel has completed their shutdown of their D-AMPS and AMPS networks in September 2008.
Read more about this topic: Digital AMPS
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