If you will be taking your Samsung Galaxy Tab with you on a trip, you may want to keep an eye on your data usage while roaming. There are some wireless networks out there that will overbill your wireless provider when you connect to them. Enable or disable Data Roaming with these steps.
1. From the Home screen, press Menu and select Settings or tap Applications and select Settings.
2. Choose Wireless and networks.
3. Select Mobile networks.
4. Check Data roaming to turn it on and use data while roaming. Uncheck it to turn it off and not have data while roaming.