These four apps run in the background whether you want them to or not. When it comes to "Phone app" well that will always run in the background. iPod, Mail, and Safari will run in the background but you can force quit them by the new method... I'm against that. so I use an app that was pulled off the app store. "Free Memory". which frees up memory and has another option of killing apps running in the background. Oh joy : ) but at times when I open up "Free Memory" I notice "Mail" is running in the background.. and even "iPod".. This is because Mail, iPod, and Safari will occasionally turn themselves on so that they launch faster for the user. Oh and my "Safari" doesn't run in the background because I restricted it : ) I don't use Safari I use 3rd party browsers such as "A Perfect Browser". It doesn't run in the background and its not a memory hog like Safari. so I think Apple should gives us options to toggle these apps to run in the background or not. Same for third party apps. Well when we can run them in the background legally lol