I was approached by the principal while I was using my modified tone dialer on a pay phone in the hall and he freaked out a bit and I showed him it was for dial

I was approached by the principal while I was using my modified tone dialer on a pay phone in the hall and he freaked out a bit and I showed him it was for dialing stored numbers and he looked at it for a second and said “Ok. It’s just that it looks a lot like a pager… maybe be more discrete with it”