Acer S520 User Manual - Page 21
Multitasking, Turning off your smartphone, Forcing phone shutdown
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Multitasking You can have multiple applications open at the same time. To open a new application, tap the home button to return to the Home screen, then start the new application. Tip: To prolong battery life, it is better to close an application when you've finished using it. Do this by either pressing the Back key or the Menu button and selecting Exit (if available). Turning off your smartphone 1. Press and hold the power button until you get the phone options menu. 2. Tap Power off > OK. -OR• Simply press and hold the power button until the screen turns off (around 5 seconds). Forcing phone shutdown If the normal shutdown isn't helping, you can simulate a battery removal (or "battery pull"). To do this, press the power button and hold for around 12 seconds. 21