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Key terms: amps phone network mobile service gsm mhz analog fcc channels digital cellular frequency calls oki carriers wireless tdma technology uhf esn min operated signal customer cloning amps networks alltel verizon shut down no longer coverage united states telephone converted telecom license discontinued analog amps transmission amps service t mobility bell mobility telus mobility communications advanced mobile phone cellular companies mobile phone system digital technologies electronic serial number Search external links cited by footnotes on Wikipedia page Advanced Mobile Phone System: |
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