Managing Power

All of this connectivity comes with a cost. In order to save battery power, you should disable services you aren't using. This is especially true when you are traveling and can't charge your phone immediately. Generally, you're going to want to use a 2G signal for passive phone use and making calls. Use 3G when you're surfing the Internet or using data-intensive apps. Keep your GPS off unless you're using a map or other app that hooks into your location. Turn off Wi-Fi and Bluetooth when you're not actively using them.

In order to make all this management easier, some phones ship with a power strip widget that lets you toggle your signal on and off with a touch. If your phone did not ship with one, you can download dozens of widgets to give yourself the same control.

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