Samsung SPH-M360ZKASPR - Manual (Page 101)

3B. Web and Data Services 91
Web a
nd
Dat
a
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/Tools > Settings > Others >
Data> On/Off in your phone’s menu.