Glossary
195
Frequency
A measure based on time, as one or more waves
per second, in an electrical or light wave
information signal. A signal’s frequency is stated in
cycles-per-second or Hertz (Hz).
LCD
(Liquid Crystal Display) Commonly used to refer to
the screen display on the wireless phone.
Phone password
Security code used to unlock the phone when you
have selected the option to lock it automatically
each time it switches on.
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.
Roaming
The ability to use a wireless phone to make and
receive calls in places outside of the home service
area.
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.
Summary of Contents for SCH-E159
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