User's Manual

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SIM (Subscriber Identity Module)
It contains subscriber details, security information and memory for a personal
directory of numbers.
SMS (Short Message Service)
Messages to be sent and received between the network service operator’s
message center to your mobile phone. To use this service, it must be supported
by your network.
WAP (Wireless Application Protocol)
A standard specifically created for mobile communication devices which give fast
and easy access to Internet information and services.