Most after market cases use magnets to hold them closed, the downfall to this is they will actually activate the dock modes on your phone while its in your case and end up killing your battery or opening applications, I've discovered an easy fix to this problem, by enabling the security pattern swipeswipe lock screen on your phone it keeps the phone from allowing the magnets to activate it. Go to - settings - location/ security, then enable and set unlock pattern, Hope this helps, it worked for me.