More and more frequently, when I call my boss, she hears a horrible screeching noise through the phone. I can't hear anything but she says its really loud and like a high pitched screech and has to hang up the phone. It was only happening once every now and again but now its happening more and more often. I have tried to Google it and saw that some people tried turning the Noise Cancellation mode off but that doesn't appear to have helped. It hasn't happened with anyone else either just when I'm calling my boss - I don't think it's ever happened when she's called me, only when I all her. Has anyone else had this trouble and if so, what worked for you? I have an iPhone X and she has a Samsung (sorry not sure what model). Thanks in advance!