You often press the back button on your screen repeatedly as a quick way to exit the app. Even if the app disappears, it will still run in the background. It only closes until you've set the app to ...

Choose an app category, like Browser app or Phone app. Pick a new default app from the list. To reset the default apps, select Reset app preferences from the apps list in Settings. This article ...

Android typically forces low-priority apps to sleep so that they don't drain your phone's battery. Putting apps to sleep means they won't consume a lot of power and won't run in the background ...