46 June 22, 2006
Subscriber Identity Module (SIM) and Identification Label W220
PRELIMINARY
Subscriber Identity Module (SIM) and Identification Label
SIM
A SIM is required to access the existing local GSM network, or remote networks when travelling
(if a roaming agreement has been made with the provider).
The SIM contains:
• All the data necessary to access GSM services
• The ability to store user information such as phone numbers
• All information required by the network provider to provide access to the network
Identification
Each Motorola GSM phone is labelled with a variety of identifying numbers. The following
information describes the current identifying labels.
Mechanical Serial Number (MSN)
The MSN is an individual unit identity number and remains with the unit throughout its life.
The MSN can be used to log and track a phone on Motorola's Service Center Database.
The MSN is divided into 4 sections as shown in Figure 49.
International Mobile Station Equipment Identity (IMEI)
The International Mobile Station Equipment Identity (IMEI) number is an individual number
unique to the PCB and is stored within the unit's memory.
The IMEI uniquely identifies an individual mobile station and thereby provides a means for
controlling access to GSM networks based on mobile station types or individual units. The full
IMEI structure is listed in Table 2.
Figure 49. MSN Label Breakdown
MSN 10 Digits
3 Digits
APC
1 Digit
DC
2 Digits
DC
4 Digits
SNR
Account Product Code
i.e. StarTAC
TM
Phone130
Distribution Center
i.e. Easter Inch
Date Code: Year and
Month of Shipment
Unit's individual serial
number
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General
Weight and Dimensions
