Search results with tag "Advanced mobile phone system"

CELL-PHONE TECHNOLOGY - WikiEducator

ESN is a permanent part of the phone while both MIN and SID codes are programmed into ... (Advanced Mobile Phone System) was approved by the FCC and first used in Chicago. AMPS uses a range of frequencies between 824 megahertz (MHz) and 894 MHz for analog cell phones. In order to encourage competition and

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