I talked to a friend of mine about them and he works for a company as an IT specialist. He said task killers will kill the phone over time and here is why: 1. All programs are running for a reason, be it reading or writing. To kill the programs can destroy them. 2. You just killed the apps. Prepare for lag and fast battery drain, because these apps are gonna all start back up at one time to finish what they were doing. 3. Android is like Linux. It will shut down less used programs to keep the memory from getting low. In the end, he said, get rid of task killers, unless you want to keep buying a new phone every few months. Just thought this was interesting.