Has this happened to anyone else on campus?

Twice now while I have been sitting on campus waiting for my next class I have been approached by different guys asking me my name, major, where I'm from, and if I have iMessage. I thought it was kind of odd the first time it happened, but now that it has happened twice I'm getting suspicious. Especially since they specifically asked for iMessage. Has anyone else experienced this around campus? Is it some kind of new scam?