Number Assignment Module (NAM) is an
electronic memory in a
cellular phone
A mobile phone or cell phone is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones ( landline phones). This radi ...
that stores the
telephone number
A telephone number is the address of a Telecommunications, telecommunication endpoint, such as a telephone, in a telephone network, such as the public switched telephone network (PSTN). A telephone number typically consists of a Number, sequ ...
,
international mobile subscriber identity and an
Electronic Serial Number
Electronic serial numbers (ESNs) were created by the U.S. Federal Communications Commission (FCC) to uniquely identify mobile devices, from the days of Advanced Mobile Phone System, AMPS in the United States starting in the early 1980s. The adminis ...
. Phones with dual- or multi-NAM features offer users the option of registering the phone with a local number in more than one market.
Mobile technology
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