LG LG400G - Manual (Page 80)

Glossary
77
SDN (Service Dial Number)
Telephone numbers supplied by your
network provider and giving access to
special services, such as voicemail,
directory inquiries, customer support
and emergency services.
SIM (Subscriber
Identification Module)
Card containing a chip with all the
information required to operate the
phone (network and memory
information, as well as the subscriber's
personal data). The SIM card fits into a
small slot on the back of the phone
and is protected by the battery.
SMS (Short Message Service)
Network service sending and receiving
messages to and from another
subscriber without having to speak to
the correspondent. The message
created or received (up to 160
characters long) can be displayed,
received, edited or sent.
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