The Mysterious Stranger is always one of those Fallout perks I feel like I should take, but I never do. I don't even like working with any of the series' companions. I can handle my own self, thank you. But it is hilarious/awesome when he does show up, crouches, and busts a cap in someone's ass, totally blindside.
For those who always chortle whenever the Stranger's foreboding film-noir piano theme comes up, here's a ringtone that should delight you. Xbox Live's Major Nelson gave it out this week, along with instructions on how to put it on your mobile phone. Like its namesake, it's cool enough that people not in the know won't suspect anything. But a Fallout fan who hears this at the airport or in a grocery store is surely going to appear out of nowhere and tell you how rad you are.
There are three audio files in total, in formats supporting Android, iOS and Windows Phone. And for more strange, mysterious fun, check out this video, from YouTube's FluffyNinjaLama. It's all the things Nick Valentine will say whenever the Stranger appears and disappears.