My IPhone 6 plus touch screen does not respond at times
My Iphone 6 plus touchscreen does not respond several times a day, especially after updating the version to 9.2.1 (13D15). Also I noticed that my IPad 6 is also having the same problem at times but very less frequently. On my IPad I never had this issue till it was updated to 9.2.1
Are these a software issue? In fact, the IPad i feel its not frequently so I am not much bothered about it. But IPhone whenever I need to call someone urgently I am unable to use it. It's really disturbing, after paying this much of amount and buying IPhone 6 plus, such issues are really ridiculous. If it is software issue, when will there be an update? If not a software issue, how could I solve it?
iPhone 6 Plus, iOS 9.2.1