210 Section 3B: Data Services
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 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
O > Settings/Tools
> Settings > Data Services > Data Services > Off.