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Can I make calls and use data services at the same time?
You cannot use voice and data services simultaneously. If you
receive a call while data service is active, the call will be
forwarded to voicemail. You can place an outgoing call
anytime, but it will interrupt any in-progress data session.
When is my data connection active?
Your connection is active when data is being transferred.
Incoming calls go directly to voicemail. When active, the
indicator flashes on your phone's display screen.
When is my data connection dormant?
If no data is received for 10 seconds, the connection goes
dormant. When the connection is dormant, voice calls are
allowed. (The connection may become active again quickly.)
If no data is received for an extended period, the connection
will be terminated.
Can I sign out of data services?
You can sign out without turning off your phone; however,
you will not be able to use Web or other data services. While
signed out, you can still place or receive phone calls, check
voicemail, and use other voice services. You may sign in again
at any time. To sign out, go to Menu > Settings > More... > Data
> On/Off (and select Off) in your phone's menu.
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Section 3B: Data Services