Discovering capabilities of offline users

A method for discovering capabilities of a first device operable to communicate with a second device using a telecommunications network, the first and second devices being registered at a service platform of this network, the first device being capable of accessing the service platform through a first core network and the second device being capable of accessing the service platform through a second core network, the method comprising:

• receiving at the first core network a request from the second device for discovering capabilities of the first device;
• determining by the first core network a first status indicator of the first device;
• routing the request from the second device to an application server of the service platform;
• identifying the first status indicator of the first device by the application server and determining a second status indicator of the first device;
• and
• sending a response from the application server to the second device, the response containing a set of feature tags defined by a network operator of the first device which describe a set of services supported by the first device.