Hmmm lol DO let us know if you get that invoice paid ! I think there'd be a few people following that path. My phone is also used to receive calls for work and it's kinda critical work also in some ways so I can't really ignore calls. I don't recall ever getting a private number call but it could happen - that's why I have set it to go to voice mail automatically in the event of a private call - so that they can at least leave me a message if its a genuine call.