Decided totake advantage of the one hundred dollars off back to school and replace my faithfull Z10 with a K2 mainly to get battery life and go back to PKB. I am happy with the phone so far but twice now I have gotten a low memory notification and saw a bunch apps I had used running in the background. As I forced these to stop my memory steadily increased. How do I prevent them from running in background? Searched the phone and could not find a setting thanks.