LG H955 Owner's Manual

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Important notice
5.  Opening and switching applications
Multitasking is easy with Android; you can keep more than one application running at
the same time. There is no need to quit an application before opening another. Use and
switch between several open applications. Android manages each application, stopping
and starting them as needed to make sure that idle applications don't consume
resources unnecessarily.
1  
Tap  . App previews of recently used applications will be displayed.
2  
Tap the application you want to access. This does not stop the previous app from
running in the background. Make sure to tap
 to back out of a window after
using it.
To close an app from the recent apps list, swipe the app preview to the left or right.
To clear all apps, tap
Clear all. 
6. If the screen freezes
If the screen freezes or the phone does not respond when you try to operate it:
Press and hold the
Power/Lock Button and Volume Down Button for about 10
seconds to reset your phone. To turn your phone off, press and hold the
Power/Lock 
Button and the Volume Down Button for about 20 seconds. If it still does not work,
please contact the service center.