User's Manual

179 Section 3B: Sprint Data Services
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 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
Settings > PCS Vision > Disable PCS Vision in your phone’s menu.