How to Close Open Apps on Android
Sometime you need to close some application to free some memory. Android gives you some ways to close such apps
The main way is to follow this ...
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Lock your Android phone automatically after its screen turn off. This action can be done immediately or after from 5 seconds to 30 minutes. Samsung Galaxy owners like S3, S2, Ace needs to follow these steps to customize lock screen timeout:
1. Open "Settings" app and go to "Accessibility"
2. Tap "Lock Automatically"
3. Choose Immediately so the phone screen locks as soon as screen turns off. or from 5 seconds. You may also define a time gap from turning off the screen to locking the screen (This time can be set from 5 seconds to half an hour)