I've just received my new sim from BT. I was already with BT but didn't realise by signing up to a cheaper deal I would have to set up a new sim. The new sim has my original BT number and says I need a PAC number from my previous supplier. However, about six months ago I left vodaphone to move over to BT. I needed a PAC number then, but surely not if I'm already with BT (as I am now). None of the information available has this scenario. Please help?