Samsung SGH-X105NBATMB User Manual
Page 150
G lossary
147
PUK (PIN Unblocking Key)
Security code used to unlock the phone when an incorrect PIN
has been entered three times in succession. The eight-digit
number is supplied by the service provider with the SIM card.
Roaming
Use of your phone when you are outside your home area (when
travelling for example).
SDN (Service Dialing Numbers)
Telephone numbers supplied by your network provider and
giving access to special services, such as voice mail, 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 can be
displayed, received, edited or sent.