I smashed the screen on my iphone 5 and therefore bought the complete front panel i.e glass, digitzer and LCD all in one unit. All i needed to do was take the microphone, ear speaker and front and back camera off the old unit, fix it to the new unit and put the phone back together. It was perfect for a few days but now the Screen behaviour is erratic. It is acting like i am touching the screen but i am not. Anyone know what the problem could be?