My iPhone 6 is just under 18 months old and suddenly the touch screen has intermittently become unresponsive and sometimes over responsive (i.e. it opens apps or dials numbers without being touched). I first noticed the problem last weekend with iOS 9 but even having downloaded iOS 10 the same problem is occurring. I have done a full reboot from iCloud and still the same problem. Virgin says its out of warranty and that I need to stump up £240.00 for a repair. I dispute this as the phone hasn't been misused or damaged, surely I'm entitled to expect an iPhone to last longer than 18 months? I'm still paying for the phone on contract. Has anyone else had this problem and if so how was it resolved?