This just happened to me and I am a little shook. Very weird. I was talking to my friend in NYC and randomly this voice came on the line saying “this call is being recorded”
He heard it as well. We both have iPhones and were just talking over the PSTN. Wtf
That’s pretty creepy. I had computer voices asking me whether I agree to being recorded for training purposes when calling customer support and the likes. But never during a private call.
Maybe contact/write to your provider or something?