How do you actually close an app? I back out of everything I go into, and yet, I see so many things running that I opened a few days ago but haven't been back into since. When you force stop an app, does it do any harm? (stupid question, but ?) Under running services, what things need to remain running? There are so many things that I don't know what they are/what they mean, like PVMtpservicestart, what the heck is that? Or HtcDmService. ? Help, and thanks!