Got a similar missed call on 10th Dec '10 in the morning , from +923472120094. and I called back, I thought that is India number, that person who talks in hindi, he said that you won 25 lakh lottery from Vodafone for your special number, and he given a number (00923472120094, Vijay Kumar, Senior Supervisor) asked me to call to him,I didn't make any calls to that number, as I understand it's fake calls.
One request for Vodafone Service is please disable the International out going service and activate when ever they want to call to international calls by the confirmation from your support team. we simply replied to them not even to see from which country the number is. actually I have seen the number from my mobile is like +9234..., I thought that it's somewhere from India, if out going call is failed I should know that number is other than India.