The problem I am seeing is that this code is not always received. For example tonight I tried logging in, was asked for the code but never received the SMS. Used the alternate method via email. I tried then adding the same number and the cofirmation code was received. Tried again and the code was not received.
I suspect Microsoft is using some SMS provider that either has problems with Vodafone interconnect or is trying to use a cheap route that is not always sending through to Vodafone.
Anyone else seeing this?