how stop messenger from ringing on two phones at the same time
I have two phones. both have fb messenger installed. whenever someone calls me on fb messenger, both phone ring at the same time. it gets annoying to have two phone ringing. I only want one of them ringing. but I can't seem to disable the ringing on my iphone. No I cannot silent, turn off wifi/data or put on do not disturb as I get important messages on this iphone as well. I just don't want the messenger ringing. on one phone only. the other phone is okay.
iPhone SE, iOS 14