Abstract: A verification process is executed between a software-controlled communication device and a software-controlled server in a network to verify that an unconfirmed telephone number, which is transmitted to the server, corresponds to an actual subscription telephone number and that this subscription telephone number is assigned to the communication device. In the verification process, the server initiates a verification call to the unconfirmed telephone number from a selected calling telephone number. The communication device intercepts the verification call, identifies the originating telephone number, and transmits the originating telephone number to the server. The verification succeeds if the originating telephone number matches the calling telephone number.

Abstract: A method for establishing communication between a first communication device (110) of a first communication network (180) and a second communication device (120a, 120b) of a second communication network (160) is disclosed. In one embodiment, a service provider (130) receives a message indicative of an intention of the first device to call the second device. A communication provider (140) in communication with the service provider establishes a communication channel with the second device via the second network based on the message received at the service provider and connects the communication channel established between the communication provider and the second device with another communication channel established in response to an incoming call from the first device to the communication provider via the first network. The establishment of the communication channel between the communication provider and the second device is initiated before establishment of the other communication channel is completed.