Turning your data connection off can help save battery life and save money on data charges.
However, if you don’t have data connection turned on and you’re also not connected to a Wi-Fi network, you won’t receive automatic updates to your email, social network accounts, and other synchronized information.
From the Home screen, press
, and then tap
Select the Mobile network check box to turn on the data connection; clear the check box to turn off the data connection.