Samsung SGH-X427 - Manual (Page 166)

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Glossary
To help you understand the main technical terms and
abbreviations used in this booklet and take full advantage
of the features on your mobile phone, here are a few
definitions.
Call Forwarding
Ability to reroute calls to another number.
Call Holding
Ability to put one call on standby while answering or
making another call; you can then switch between the two
calls, as required.
Call Waiting
Ability to inform users that they have an incoming call
when engaged on another call.
Caller Line Identification Services (Caller ID)
Services allowing subscribers to view or block the
telephone numbers of callers.
Dual Band
Ability to operate with both DCS (1900 MHz) and GSM (850
MHz) networks. The phone automatically uses the network
with strongest signal and even switches networks during a
call within the same operator’s network.