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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