Consumer devices and methods for operating consumer devices are disclosed. A consumer electronic device may include user identification unit incorporated into a control module of the device. A user of a consumer electronics device is uniquely identified using a metric that is contingent upon the user using the device normally. Content that depends on the user's identity can be provided to or from the device. The user may be uniquely identified using a biometric sensor to provide the metric. The content provided to or from the device or other performance characteristics of the device may be tailored to the particular user based on the user's identity.