I was about to post this, thank you for doing so.

Seriously? What could they be thinking? The entire premise of 2-factor - in most cases, something you know and something you have - is that if someone steals/guesses/social hacks my secret, they don't have my keyfob (or phone); if someone steals my keyfob or phone, they don't have my secret knowledge. The probability of losing both is much lower than either.

But using just one factor, and one that goes across insecure networks, and is visible on my phone even on the lock screen? And I cannot use it if I have mobile issues? Really??