iPhone problem
Michael Corgan
Since upgrading to iOS 9.3.4 a problem has arisen when making a call. It is intermittent and has survived a hard restart of the iPhone. In brief and particularly when calling 121 the screen blacks out. I can bring it back by pressing the Home button, but there is then no response to any other button so that I cannot then terminate the call nor delete messages. I have to switch the iPhone off and then on again to start all over again, but usually the same problem recurs. It may have nothing to do with the upgrade of course.
I have so far found one other person who has had the same experience, but has no answer to it.