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Line 1: {{context}} ~~Ever wondered how the cellular companies find out when you are out of station and soar your mobile bill with roaming charges?~~ ~~Well here's the culprit...~~ A '''System Identification Number''' ('''SID''') is used to identify a cellular network in a certain area. It is a Global number to identify [[Base station\|base stations]] for [[AMPS]], [[Time division multiple access\|TDMA]] or [[CDMA]] networks. This number sometimes has conflicts (see [[IFAST]]).

System identification number: Difference between revisions