1. How do you remove birthdays from your calender app? I think they were added automaticaly from facebook and i would like to delete some of them.. 2. Is there any antivirus app that you use? I would really like to insatall one, you are never to safe. 3. How do i turn on battery empty notification? In the settings it says that it is turned on, but ive never seen a notification, it always shut down suddenly, when i dont expect it. Thank you very much for your help!