Radio Shack CT-354 - Manual (Page 34)

34
SID SCREENING
If two different cellular market areas are located
close to one another, a call designated for the A (or
B) carrier in one market can sometimes be placed
using the A (or B) carrier located in the other mar-
ket area. This can result in unwanted roaming and
higher charges.
At the time of activation, we program a code into
your phone that uniquely identifies your cellular
carrier. To prevent unwanted roaming, your
phone’s System Identity (SID) screening feature
lets you set your phone to look for your designated
carrier’s code signal each time you place a call, so
the calls you place use
only your carrier.
Notes:
• When SID screening is set to on and the
phone cannot locate your designated carrier’s
signal code, your call will not go through. The
phone will not roam.
• Depending on the service area, some emer-
gency calls might go through, even if SID
screening is set to on and the phone cannot
locate your designated carrier’s code signal.
• When SID screening is set to OFF, your phone
automatically roams according to the selected
cellular system type (see “Setting the Cellular
System Type” on Page 31).
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