Electrical systems and related methods are disclosed. An electrical system includes a wearable mobile electronic device including cellular voice equipment configured to enable a user to participate in cellular voice calls, cellular data equipment configured to enable the wearable mobile electronic device to communicate through a cellular data network, one or more biometric sensors, and at least one audio speaker. A method includes selecting audio media based, at least in part on biometric information, and providing, with a remote server, data corresponding to the selected audio media to the wearable mobile electronic device through a cellular data network. An electrical system includes a wearable mobile electronic device including control circuitry configured to interact with a remote server to together provide smart mobile electronic device features to a user through the wearable mobile electronic device, wherein the control circuitry is alone insufficient to provide the smart mobile electronic device features.