They would call me out of the blue in the middle of the day expecting I pick up and have time to talk with them like I would be jobless person waiting for them to call. I didn’t pick up at all because I was busy.
Earlier I remember I would get an email to at least give me heads up they will contact me next week or something. It was also quite common recruiters were calling me at the end of the day.
For those last ones I got an email saying they were calling. I replied they can try on a day where I don’t have meetings and best time - they never replied to email or tried to call….
I don’t expect it should be all about me, but my idea is that small email saves everyone’s time.