Samsung SPH-A660 User Manual page 75

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 of time, the connection will terminate.
Can I sign out of data services?
You can sign out without turning off your phone, however you will not be
able to browse the Web or use other PCS Vision 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
/ / in your phone's menu.
Settings Internet Sign Out
Section 3: Using PCS Service Features
SM
3B: PCS Vision
126