Fun story about that, back when these were popular and cell phones interacted with them, I was working with a band called “Matt Hates the Box” and they had a really good take of some recording, but a text message came in and over-wrote on the recording the beeping modulation sounds.

I was able to rescue the take because the modulation was a very specific pulse of tones, so I went in and EQ’d out the beeps and we were able to keep the recording on the record as is minus that one minor change.

This is always the memory that comes to mind every time I’m reminded of this phenomenon.