Apparatuses and methods for enabling IMS services for non-IMS UEs via a home base station subsystem are described. In various embodiments, a home base station subsystem includes a message generator configured to generate an Internet Protocol multimedia subscription request message comprising a unique user identifier and an information request message, the information request message requesting an Internet Protocol multimedia subscription for the user identified by the unique user identifier. The home base station subsystem also includes a transmitter configured to transmit the generated Internet Protocol multimedia subscription request message to a user database.