I very seldom use the silent switch on the side of my XS max. But yesterday I was at a concert and put the phone in silent mode. I observed the screen showing it was in silent mode. Just as the concert was ending I received a call which rang just as if I had not put the phone in silent mode. A couple of observations....first of all I just got (about a month ago) an Apple Watch series 4. Secondly the phone call was from my brother who is in my contact list. Now I’m pretty sure it has to do with some setting I have wrong but before I go randomly changing things I thought I might ask the experts here. I don’t often need to change the switch to silent but I would like to know that I can and get the desired results. Any advise will be appreciated.