This document summarizes a conference on performance measurement for mobile networks and services held from April 28 to May 1, 2008 in Budapest, Hungary. The conference focused on achieving accurate and cost-effective performance measurement to optimize network capacity, service quality, and customer satisfaction. Presentation topics included measuring end-to-end and end user experience performance, defining key performance indicators, and using measurement to identify and solve network problems in real time. Speakers included representatives from major mobile operators worldwide.