What is the best task killer to download? I downloaded one called "Advanced Task Killer Free" - and it has tabs for like services, apps, system, etc... but I don't know which ones I shouldn't end. My main concern is the extreme lag on my phone! It's so laggy... I just bought this june 1st and am thinking of returning it and getting the evo because I know that phone is a beast. I hate texting on this because it takes so long to get into the texting screen.