Yes! The war dialling in this movie was great, as was the hacking (or 'cracking' if you're gonna be precious about it). Also there's a scene where David needs to make a call without change and hacks a payphone using a technique that worked IRL.

Arguably one of the only two truish-to-life hacker movies ever made (the other of course being Sneakers, http://www.imdb.com/title/tt0105435).