All phones use an internal battery to provide power to the phone. Some phones feature a keypad to control the phone, while others feature a touchscreen. The best way to conserve battery life is to turn off the phone when it is not in use. Turning off your Samsung mobile phone requires only a few simple steps.
Locate the power button on your Samsung phone. The button is often located on the top of phones that feature a touchscreen, or on the keypad of phones that do not.
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Press and hold down the power button. The screen will go black.
Tap or slide the "Power Off" switch on the touchscreen. The screen will go black when the phone is turned off.