Number Assignment Module (NAM)1 is an electronic memory in a cellular phone that stores the telephone number, international mobile subscriber identity and an Electronic Serial Number. Phones with dual- or multi-NAM features offer users the option of registering the phone with a local number in more than one market.
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Last revised Jun 21, 2026
Number Assignment Module
Number Assignment Module (NAM) is an electronic memory in a cellular phone that stores the telephone number, international mobile subscriber identity and an Electronic Serial Number. Phones with dual- or multi-NAM features offer users the option of registering the phone with a local number in more than one market.