Account types that support one or more data classes (e.g., email, contacts, calendar, instant messaging) can be added and configured on a mobile device using a unified settings user interface. The user interface allows the user to easily activate and deactivate one or more data classes for an account type. The user interface can support one or more predefined account types and can allow the user to add and configure new account types. Visual indicators are provided in the user interface to remind the user of the data classes that are active on the mobile device for a particular account. Users can configure settings that effect a particular data class in all accounts on the mobile device. Users can also configure settings that are specific to a particular account.