And before you say that will never happen read giffgaff (cellphone company) privacy policy: https://www.giffgaff.com/boiler-plate/privacy https://www.giffgaff.c

And before you say that will never happen read giffgaff (cellphone company) privacy policy: https://www.giffgaff.com/boiler-plate/privacy https://www.giffgaff.com/boiler-plate/privacy Section "3. The information we collect" then "5.iv. To third parties from whom you have chosen to receive marketing information."... Which means they can give your browsing history, numbers you call etc to any company who you have agreed to receive marketing information from. Eg: Tesco Club Card, that-random-website-you-forgot-to-untick-the-box-on.com etc.