I got it online (Mac, Safari) yesterday. However, the situation was odd. I signed on as usual with 2FA, did a search, then hit Back to modify the search. Hitting Back apparently buggered something since all further search attempts failed, showing a "UA can't do this, please call" message. I quit the app, cleared cache, and attempted to sign onto the website again. When logging on again, I got the SMS code form. After entering the code, login was successful.

One additional detail. I had the same problem (failed searches following a Back) a few days ago. In that case - signing out, quitting, clearing cache - resulted in my not being able to log back in at all; the log-on page would merely blink on hitting Submit. Half-an-hour later, I was able to sign on. I repeated the Search, Back, Failure sequence and, again, after quitting I was not able to sign back on. I sent a note to CC noting a "bug" requesting that it be forwarded to the Web Desk. Maybe they were working on the SMS installation and things weren't quite in place?