My san Fran is running swedish spring v2.2 rls5. when I turn it on to use it it goes to 'phone options' silent mode, vibrate mode,power off, airplane mode or switch off and sometimes when I press the flashlight button the phone vibrates to aknowledhe the sction but does not turn on the flashligh. It'been generally frustrating as it doesn't seem responsive and unreliable. What can I do to make it reliable and usuable?