I joined GiffGaff a few months ago and wanted to keep my number. I went through the process of transferring my number and all seemed fine. Over the past few months when I have called or text people they have asked why I'm calling them off a random number. It transpires that sometimes I text or call people from my number (which I wanted) and other times (I am assuming) that I text or call people from the original Giff Gaff number. It seems as if my phone number was not taken over properley.