The Communications and Information Technology Commission (CITC), Saudi Arabia's telecom watchdog, has said the kingdom's three mobile phone firms must end their policies of not charging a roaming premium for incoming calls made from abroad using Saudi-registered phones. The decision was made because many Saudi Zain, STC and Mobily customers have subscribed to the Saudi mobile services despite living abroad. A spokesman for Mobily told Saudi Gazette that it could not be forced to start charging a roaming tariff, which was against the best interests of consumers. However, Zain and STC said they would enforce the decision.