Method for providing roaming services, for a user equipment, within a mobile communication network, the mobile communication network comprising a core network and an access network, the access network of the mobile communication network comprising at least one radio cell being served by a base station entity, wherein the user equipment is able to be attached to the mobile communication network via the base station entity despite the user equipment being related to a further mobile communication network as the home public land mobile network of the user equipment, wherein the core network comprises a serving core network node and a home subscriber server functionality, wherein the serving core network node provides mobility management functionality regarding the base station entity and thereby provides mobility management functionality regarding the user equipment, wherein the further mobile communication network comprises a further core network, the further core network comprising a further home subscriber server functionality, the further home subscriber server functionality being able to provide subscription profile data regarding the user equipment, wherein upon attachment of the user equipment with the mobile communication network the method comprises the following steps: -- in a first step, the serving core network node requests, from the home subscriber server functionality and by means of a first request message, subscription profile data regarding the user equipment, -- in a second step, subsequent to the first step, the home subscriber server functionality requests, from the further home subscriber server functionality and by means of a second request message, subscription profile data regarding the user equipment, -- in a third step, subsequent to the second step, the further home subscriber server functionality transmits, by means of a first response message, first subscription profile data regarding the user equipment to the home subscriber server functionality, and -- in a fourth step, subsequent to the third step, the home subscriber server functionality transmits, by means of a second response message, second subscription profile data to the serving core network node having requested subscription profile data by means of the first request message, the second subscription profile data corresponding at least in part to the first subscription profile data. -- in a first step, the serving core network node requests, from the home subscriber server functionality and by means of a first request message, subscription profile data regarding the user equipment, -- in a second step, subsequent to the first step, the home subscriber server functionality requests, from the further home subscriber server functionality and by means of a second request message, subscription profile data regarding the user equipment, -- in a third step, subsequent to the second step, the further home subscriber server functionality transmits, by means of a first response message, first subscription profile data regarding the user equipment to the home subscriber server functionality, and -- in a fourth step, subsequent to the third step, the home subscriber server functionality transmits, by means of a second response message, second subscription profile data to the serving core network node having requested subscription profile data by means of the first request message, the second subscription profile data corresponding at least in part to the first subscription profile data.