6809497A15-A January 31, 2006 41
Level 1 and 2 Service Manual Subscriber Identity Module (SIM) and Identification
International Mobile Station Equipment Identity (IMEI)
The International Mobile station Equipment Identity (IMEI) number is an
individual number unique to the PCB and stored within the phone's memory.
The IMEI uniquely identifies an individual mobile station provides a way to control
access to GSM networks based on mobile station types or individual phones. The
full IMEI structure is listed in Table 2.
Where:
TAC Type Allocation Code, formerly known as Type Approval Code
NN Reporting body identifier
XXXXXX Type identifier
ZZZZZZ Individual unit serial number
A Phase 1 = 0.
Phase 2 = check digit defined as a function of all other IMEI digits
Other label number configurations present are:
• TRANSCEIVER NUMBER: Identifies the product type, usually the SWF
number. (for example, V100).
• PACKAGE NUMBER: Identifies the equipment type, mode, and language in
which the product is shipped.
Table 2. IMEI Number Breakdown
TAC Serial Number Check Digit
NNXXXXXX ZZZZZZ A
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