I like this and though I rarely talk on the phone, when I do the vast majority of the time I pace back and forth. Even at the office I’d close the door and do the same. Never thought about these actions at all until now.
Maybe somewhat related growing up my older brother used to do push-ups (usually 20) every time he opened the refrigerator. Watching that day in and day out while he was in high school left a lasting impact on me. No doubt it is odd, but I’d do push ups in all sorts of situations, for example playing disc golf if I had a really bad throw, I’d drop and do push-ups. Maybe something OP could do every time the phone opens, just don’t look at it like a punishment, rather something healthy that helps build discipline and genuine thought to your actions. Plus inevitably it will open the door to openly discussing it with others.