hey man, first of all I know it sounds patronising but have you clicked enter instead of using the mouse to click the big yellow button?? for some reason the button tends not to do anything... if that works great, but if not try a different number as many networks seem to be unsupported by their messaging service... I've been struggling with this for months now and tried every trick in the book (UK, three network) and it still hasn't been fixed and there is no bungie call centre to get in contact with to go about validation that way... seems us free to plays are stuck for now... maybe this is how bungie gets people to buy their DLCs, because we apparently cant access the SMS validation and are either purposefully or inadvertently stuck behind a paywall hahaha