I used to use a palm III for "redboxing" payphones back in the day in a country which didn't use multifrequency tones to signal a coin drop. Was pretty much the

I used to use a palm III for "redboxing" payphones back in the day in a country which didn't use multifrequency tones to signal a coin drop. Was pretty much the most fun I had with the thing, it had a BASIC interpreter you could download so writing little programs that could do stuff like that wasn't actually hard at all