Abstract: The present invention is a method for service provisioning to a subscriber terminal (TE) having roamed from a first communication network (H-NW) to a second communication network (V-NW), each of said first and second networks comprises an access network (H-A-NW, V-A-NW; TL-NW) via which said subscriber terminal (TE) communicates with an associated core network (H-C-NW, V-C-NW), each of said core networks (H-C-NW, V-C-NW) being provided with at least one communication control entity (H-S-CSCF, V-S-CSCF) for performing, according to available services, communication control between the respective communication network and the terminal, and a database entity (H-SLS, V-SLS) keeping a record of available communication control entities in said core network of said communication network, said method comprising the steps of: accessing (S1), from said subscriber terminal (TE), the core network (V-C-NW) of said second communication network (V-NW), discovering (S2–S10) at least one communication control entity among the