Hello, I am preparing app that will start and run in background whenever user unlock the phone. App will not display in task manager but App is Continuous run in background. so can not be killed by user. But yes app will be launched to make necessary application level settings when user will click on app icon on screen. Otherwise it will run in background whenever phone is active (unlocked). I guess it can be done using Services class but not sure how to implement it properly. So please advise how can I achieve this functionality. Thank You.