Back when payphones were still a thing, one prank I enjoyed was to dial 991-$(last 4 digits of the pay phone's phone number) from a payphone. Then you would hangup, pickup, and hangup again. Then a few seconds later the payphone would start ringing.
I have no idea what this was actually doing. Does anyone have any knowledge of how this worked?
I don't even remember how I learned this trick. Presumably I learned it from some other kid, but who knows where the knowledge originated from in our teenage social circle.
In Australia back in the day, you could dial 199 on a pay phone which was the ring back number. Hang up, let it ring twice and then answer it. If you did it right there would be a warbling tone in the earpiece and you could then make any call for free.
I have no idea what this was actually doing. Does anyone have any knowledge of how this worked?
I don't even remember how I learned this trick. Presumably I learned it from some other kid, but who knows where the knowledge originated from in our teenage social circle.