Abstract: A battery case for a mobile device, such as a mobile phone, makes a connection with the mobile device and also makes a connection with a peripherals module attached to the battery case. In one aspect, the battery case includes a built-in battery, and the battery provides power to the mobile device and/or to the peripherals module. Different power management options are available. In another aspect, the battery case includes a data path between the mobile device and the peripherals module. For example, the mobile phone may send control instructions to a camera module via the data path, and the camera module may return images via the data path. Various control and data transfer options are available.

Abstract: A device includes a wireless communication interface configured to couple to a plurality of networks, a processor coupled to the wireless communication interface, and a memory coupled to the processor. The memory is to store a set of executable instructions configured to manipulate the processor to determine a set of characteristics for each wireless network of a set of accessible wireless networks and determine a select wireless network of the set of accessible wireless networks based on a comparison of a set of characteristics of the device to the set of characteristics for each wireless network of the set of accessible wireless networks. The set of executable instructions further are configured to manipulate the processor to initiate a telephone call via the select wireless network.