Definitely. My account was recently frozen under a 'random check' to very my phone number. They didn't like the fact that I didn't have a land line phone number, cell phones are not accepted! It took 3 weeks to get it verified through their customer service.
That's an issue, since I haven't had a land line since 2002 or so. I don't even know my direct cell line any more: every 5 or 6 months I have to look it up in Google Voice.
