It's probably a courtesy thing that one company or another arranged for you, or some kind of a promotion. I never had this happen to me. It's generally the cas

It's probably a courtesy thing that one company or another arranged for you, or some kind of a promotion. I never had this happen to me. It's generally the case that if you want a prepaid SIM card, you go to pretty much any shop to buy it for a nominal fee (usually just £1, but shops that rip you off may charge up to £5 in some cases). As soon as you buy and activate a top-up voucher, you are good to go. At no point is your identity or a card payment required.