We were re-watching a DVD from a old TV series though the OPPO DVD player connected to our flat screen this evening when up popped a a message bar across the top of the screen, saying, "2421 4018 Enter the PIN# for your mobile device (iPhone). Cancel." The Samsung tv set is connected to the internet through Comcast and it supports a variety of apps like Amazon. Neither of our cell phones showed any activity when this happened but we do have a landline through Comcast but it did not ring. Does anyone have an explanation?