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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 Key. 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 Key 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
Call Waiting A service that allows you to receive another