Hi all, I will try to describe the problem My phone goes into a state of being unresponsive many times per day, usually happens at battery levels 20-0% but can happen at any battery level. - press the power button to activate screen and screen remains black despite being powered on. device may respond to button presses 10 minutes later. - when trying to type a message it is painfully slow and a single keyboard press can take 20 seconds to register - after phone restarts it will work fine, but then become unstable at seemingly random times. - error message occurs saying "the process system has stopped working" factory reset of the phone did not remedy the problem. any ideas ?