You on T-Mobile or Voda? If T-Mobile - I wouldn't bother with the hassle. You can do it after they connect you. If Voda, the webshop@mobilephonesdirect.co.uk address (including your order number) is the way to go. It said that in a previous email from them. Check you asked to do the port of course as it asked you when you signed up the very first time you put your order in