Abstract: A call is setup between an originating device (A) and a terminating device (B), which both have access to a public land mobile network (131, 132) and a mobile data network (121, 122). The originating and terminating devices device (A; B) include a respective software-implemented call handling tool (SWA; SWB) configured to assist a user in placing and receiving calls. Bridge nodes (140) are connected to the mobile data network (121, 122), the public land mobile network (131, 132) and a server node (110), which also is connected to the mobile data network (121, 122). In response to a call-setup command from a user of the originating device (A), the software-implemented call handling tool (SWA), on one hand, sends a call-setup request (1) to the server node (110); and on the other hand, makes a first call (2) to a first bridge node (140) over the public land mobile network (131) using a first telephone number (#1).

Abstract: A telephone connection is established between a first terminal and a second terminal. The first terminal is presumed to be associated with a subscription in a first home telephone network in which the terminal is identified by a first network identity. Correspondingly, the second terminal is presumed to be associated with a subscription in a second home telephone network in which the second terminal is identified by a second network identity. A host resource routes a call from the first terminal to the second terminal based on a combination of the first network identity and a first common telephone number in the first home telephone network dialed by the first terminal. The first common telephone number is selected such that it is unique and is adapted to be shared among a group of users in the first home telephone network.