The past week or so I started to notice sometimes when I unlock phone and go to do something, answer a text or whatever it may be my phone would unlock but be unresponsive to any touch input. cursors would blink if text was open but couldn't type or scroll or tap to open anything. Home button would take me home or can bring up task switcher. A respring by holding power and home button until shuts off and logo comes on helped but problem would keep coming back, I finally updated the i0s to 8.4 I was on 8.1 jailbroken figured maybe that was the issue, I did the restore and update fresh as new no back up loaded, same issue persists. help its annoying.