i was playing candy crush in my samsung galxy core 2 and as i end my game... it stopped working and as i touch the menu... it will not function anymore.. then my phone has automatic lock... so after 3o seconds it locked and i can't unlock it for whatever tapping i will do.. it will not anymore function.. i can't even turn it off.. for like the touch sensor is like i don't know... what should i do to my phone... i can still receive messages and notifications but i can't unlock my phone........