I have a few questions about my new S4: How do I get rid of the blue lines outlining everthing? I've turned off the sound for the keypad, but it still makes noise. Weather widget says it updates every 6 hours and it may result in additional charges. When and why? how do I turn it off? when I use the return key, am I closing apps, or are they still open there somewhere? since it is a mini computer, do you need virus protection? thanks! my first smartphone.