This document summarizes mobile network and smartphone usage statistics in Indonesia. It finds that Telkomsel has the largest market share of subscribers at 40%. Android is the dominant operating system, comprising 53% of smartphones. Samsung is the top selling smartphone manufacturer, and the Samsung Galaxy Y is the best selling individual device. Mobile internet users are predominantly male, aged 18-35, full-time employees with at least a high school education. Gaming, video, and music are the most commonly downloaded content.