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APPENDIX II : ABBREVIATIONS AND EXPLANATIONS
CUG
Closed User Group
GSM
Global System for Mobile Communication
GPRS
General Pocket Radio Service
SMS
Short Message Service
CB Cell
Broadcast
FDN
Fixed Dialed Numbers
SIM
Subscriber Identity Module
PIN
Personal Identity Number. Supplied with SIM card. To
unlock the SIM card.
PIN2
Personal Identity Number 2. Supplied by the network
provider. For special function in protected FDN
supported by SIM.
PUK
Personal Unlock Code. Supplied with SIM card. To
unlock the SIM card when you enter the wrong PIN
code three times. You can also use it to modify PIN
code.
PUK2
Personal Unlock Code 2, supplied with a specific SIM
card and it is to modify or enable a PIN2 code.
IMEI
International Mobile Equipment Identity consists of 15
digits. One mobile phone has only one IMEI.
MCC
Mobile Country Code
MNC
Mobile Network Code
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