Sony Ericsson ran a personalized advertising campaign across 13 countries in Central Europe to promote their K550i phone and engage users. The campaign involved a 4-week competition where users uploaded photos related to extreme sports challenges to win a trip. Personalized ads targeted users based on their location and stage in the competition, with over 140,000 ad clicks and 56,000 impressions by the end. The personalized approach helped offset ad wearout and encouraged viral sharing.