This course explores the various ways Windows Phone applications access data. Parts 1 and 2 look at creating and accessing a local SQL database on the phone. Part 3 examines the user data APIs which let applications work with contacts and calendar on the phone. Part 4 discusses accessing an external data service from a phone application. All modules focus on real-world, no-nonsense scenarios involving querying, displaying, and in some cases updating domain-specific application data.