A method of establishing a communications session in a communications system is disclosed. The communications system comprises a user terminal, a mobile terminal associated with a contact a and session initiation unit. The method comprises: identifying the contact using the user terminal; transmitting contact data identifying the contact and user data associated with the user terminal from the user terminal to said session initiation unit; in dependence on the contact data, transmitting a request from the session initiation unit to the mobile terminal, the request comprising the user data and requesting that the mobile terminal establishes the communications session with the user terminal in dependence on the user data.