Samsung SCH-I830MSASPR - Manual (Page 179)

Section 2I: Sprint Worldwide Wireless Service 171
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Services Tab
Caller ID
Caller ID displays the number (and name, if in your
PhoneBook) of incoming calls. Unlike CDMA mode, Caller ID
in GSM mode must be enabled by the user.
To enable or disable caller ID:
1. Tap the Start menu bar located in the upper left corner
of the screen.
2. Tap Settings, and ensure that the Personal tab is
displayed.
3. Tap the Phone icon, and then tap the Services tab.
4. Tap Caller ID, and tap Get Settings... .
5. Tap Hide Number or Send Number and press .
Call Waiting
Call Waiting notifies you of an incoming call even while
you’re in a call. You can then accept, reject, or ignore the
incoming call. Unlike Call Waiting in CDMA mode, Call
Waiting in GSM mode must first be activated.
To activate call waiting:
1. Tap the Start menu bar located in the upper left corner
of the screen.
2. Tap Settings, and ensure that the Personal tab is
displayed.
Note: When roaming off the Nationwide Sprint PCS Network,
availability of this feature varies by service provider and may
be limited or restricted in some areas.