A method for configuring SIP settings to a user terminal, for instance when a specific SIP service is used in the user terminal for the first time, includes transmitting a request message from the user terminal to a gateway node. As the request message is received in the gateway node, the gateway node retrieves identification information on the user terminal. After that the request message and the retrieved identification information are forwarded from the gateway node to a settings server. In response to receiving the request message and the identification information, the settings server defines service-specific SIP settings for the user terminal, and the defined SIP settings are provided to the user terminal.