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In 2002, the FCC decided to no longer require A and B carriers to support AMPS service as of February 18, 2008.
All AMPS carriers have converted most of their consumer base to a digital standard such as CDMA2000 or GSM and continue to do so at a rapid pace.
Digital technologies such as GSM and CDMA2000 support multiple voice calls on the same channel and offer enhanced features such as two-way text messaging and data services.

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