Samsung SPH-M610DAASPR - Manual (Page 126)

100 Section 2D: Controlling Your Roaming Experience
Using Data Roam Guard
Data Roam Guard asks you whether you want to roam off the
Nationwide Sprint PCS Network. Data Roam Guard makes it
easy to manage your roaming charges by requiring an extra
step before you access data during roaming. (This additional
step is not required while on the Nationwide Sprint PCS
Network.)
To turn Data Roam Guard on or off:
1. Select Menu > Settings > Roaming > Data Roam Guard.
2. Highlight Always Ask or Never Ask and press .