22 - Using your smartphone
Multitasking
You can have multiple apps open at the same time.
To open a new app, tap the home button to return
to the Home screen, then start the new app. Tap
the Menu button to quickly navigate back and forth
between previously-opened apps.
To prolong battery life, it is better to close an app when you’ve finished using
it. Do this by either pressing the Back key or the Menu button and selecting
Exit (if available).
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