Wait a second, (I'm curious because here in Australia this thing doesn't seem to exist) is this limited to their mobile site (you need app in order to log in on

Wait a second, (I'm curious because here in Australia this thing doesn't seem to exist) is this limited to their mobile site (you need app in order to log in on your phone), or you actually need to have a phone with you when you access online banking on your desktop? If it's the latter, that's crazy, what if you don't have a smartphone? That would be a complete deal breaker for me, I would switch to a different bank