I have finally come to the end of my Orange Blackberry contract - I haven't been very impressed with Orange or Blackberry so I want to go with another type of phone entirely. I've found a good deal for Samsung Galaxy S3 from Vodafone from an estore but I have no idea about how I go about keeping my old number (or moving my contacts) and I won't get any tech support from the estore. So are these easy things to sort out myself? Who do I speak to about my number which is my top priority?