This document provides a summary of a database that contains information on mobile network operator subscriptions, spectrum ownership, and infrastructure contracts globally as of Q1 2012. The database covers over 800 operators and provides data on subscriptions, deployments, forecasts, and contracts by country, region, operator, and technology. It finds that mobile broadband subscriptions using technologies like HSPA, EV-DO, and LTE grew to 844 million in 2011 and are forecast to grow at 40% annually to reach 4 billion by 2016, with LTE alone growing at 148% annually to over 600 million subscriptions. Overall cellular subscriptions reached over 6 billion in 2011 with an 88% penetration rate globally.