Headphones / Boom Mic work with apps but not with telephone
I can use my hard wired headphones / boom mic to listen to podcasts or participate in Zoom or MS Teams conference meetings successfully. But when I try to use it for a telephone call it won't work. I am using a iPhone XR with an adaptor that goes from lightning connector to 3.5mm connector for the headphone set.
I tried this link and it was not a help. https://support.apple.com/en-us/HT203026
Any thoughts?
Thanks!
Ron
iPhone XR, iOS 14