Methods and computing systems for sharing content between related devices in a cellular network are described. A first device receives content from an external content source via a wireless connection, and causes presentation of the content on an output device of the first device. The first device retrieves information for one or more related devices that utilize the same telephone number the first device for sending and receiving at least cellular communications via the cellular network. The first device enables sharing of the content with at least one related device of the one or more related devices.