User manual

User Guide
44
Abbreviations
SMS
Short Message Service
MMS
Multimedia Message Service
EMS
Enhanced Message Service
SIM
Subscriber Identity Module
GSM
Global System for Mobile Communication
PIN
Personal Identity Number
PUK
PIN Unblocking Key
IMEI
International Mobile Equipment Identity
CSD
Circuit Switched Data
USSD
Unstructured Supplementary Service Data
APN
Access Point Name
CB
Cell Broadcast
GPRS
General Packet Radio Service
UART
Universal Asynchronous Receiver/Transmitter
Card 1
Primary SIM Card (slot SIM1)
Card 2
Secondary SIM Card (slot SIM2)