Samsung SGH-E316 User Manual page 176

Glossary
PIN (Personal Identification Number)
Security code that protects the phone against
unauthorized use. The PIN is supplied by the service
provider with the SIM card. It may be a four to
eight-digit number and can be changed, as
required.
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 traveling 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.
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