Smartphones, including those running Google's Android OS, can be prone to poor battery life. If you want to make sure your handset lasts longer between charges, then you can turn off the 3G data connection. Here we show you how.
On the home screen press the menu button and then select Settings.
Select Wireless and Networks, then chose Mobile networks.
Check the box next to Use only 2G networks, then press the menu button to return to the home screen.