you must have a credit card or a click card of Doha bank in order to buy a vodafone sim card,they will launch their service with commercial bank hopefuly this week...their branches are at Mesherab opposute home center,,LuLu hyper near matar qadeem,in Alkhor near Mcdonalds,in Landmark just beside Q-tel store,,in City center which is open from past 2 days and one more branch in Carrefour Villagio