Powering down phone-enabled devices to conserve power

Most phone-enabled devices can be powered down (completely turned off) to conserve battery power. This is accomplished by pressing and holding the power on/off button (or the red End Call button if your device has no power button). Note that powering down a device is different from leaving the device in suspend mode (which means that the screen is off but the device is still using power and its phone and other core operations are still running). Pressing the power button once on a touch screen device will put it into suspend mode (pressing it once again will turn it back on). On both touch and non-touch screen devices, simply waiting until the screen turns off automatically will also put the device into suspend mode. Here are some other important facts:

• After pressing and holding the power (or End Call) button on phone-enabled touch screen devices, there is often a menu that appears asking if you want to confirm the power down.
• If you have powered down a device, you must press and hold the power (or End Call) button again to turn it back on. The device will then go through the same restart procedure as would happen after a soft reset.
• Note that not all (particularly older) phone-enabled touch screen devices can be powered down by pressing and holding the power (or End Call) button. Such devices require you to take out the battery to completely shut down the device. This goes for (non-phone) PDAs as well.
• There are also third-party applications that allow you to shut down or reset your device (without pressing any external buttons). For more on this, see “Use software utilities to reset your device.”