Connecting to Networks and Devices 43
Connecting to Mobile Networks
When you buy your phone and sign up for service, your phone is configured to use your provider’s mobile networks for voice calls and for transmitting data.
Different locations may have different mobile networks available. Initially, your phone is configured to use the fastest mobile network available for data. You can also configure your phone to access a different set of networks entirely, or to behave in specific ways when roaming.
The icons in the Status Bar indicate which kind of data network you’re connected to and the network signal strength.
Connected to the 3G network (EVDO revA)
Connected to a 2G network (1x)
The more bars that are lit, the stronger the wireless signal
Connected to another wireless service provider’s network (roaming)
When connected to slower networks, you may want to postpone using your phone for
To disable data when roaming
You can prevent your phone from transmitting data over other carriers’ mobile networks when you leave an area that is covered by your carrier’s networks. This is useful for controlling expenses if your cell plan doesn’t include data roaming.
1.Touch the Apps Key 
> Settings 
> Wireless & networks > Mobile networks > Global data roaming access.
2.Touch Global data roaming to remove the checkmark from the box. With Global data roaming uncheckmarked, you can still transmit data with a