"Phone call/SMS not working
Last Updated: Nov 18, 2013 08:56PM PST   
We've heard from some users that they have been unable to log in due the two-factor SMS text message not being sent, and the phone call verification has only worked intermittently. We're looking into this problem now and will fix it as soon as possible. Thanks for your patience while we work on this!"

well at least they acknowledged there is a problem.