A user equipment, UE, device, comprising: processing circuitry and a radio transceiver for both cellular and WLAN, wireless local area network, access, wherein the processing circuitry is adapted to: when network access has been acquired from a visited cellular operator and one or more WLANs, wireless local area networks, retrieve a setting that indicates a preference or not for IP (internet protocol) address preservation when switching between cellular and WLAN access; if no preference for IP address preservation is indicated, prefer policies for network selection and routing as indicated by ANDSF, access network and discovery selection faction, information received from an H-ANDSF, home operator ANDSF, server over information received from a V-ANDSF, visited operator ANDSF, serveur; characterized by that the circuitry is further adapted to: if a preference for IP address preservation is indicated, prefer policies for network selection and routing as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server only if the V-ANDSF server indicates that the visited operator has support for WLAN access using an S2a interface. processing circuitry and a radio transceiver for both cellular and WLAN, wireless local area network, access, wherein the processing circuitry is adapted to: when network access has been acquired from a visited cellular operator and one or more WLANs, wireless local area networks, retrieve a setting that indicates a preference or not for IP (internet protocol) address preservation when switching between cellular and WLAN access; if no preference for IP address preservation is indicated, prefer policies for network selection and routing as indicated by ANDSF, access network and discovery selection faction, information received from an H-ANDSF, home operator ANDSF, server over information received from a V-ANDSF, visited operator ANDSF, serveur; characterized by that the circuitry is further adapted to: if a preference for IP address preservation is indicated, prefer policies for network selection and routing as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server only if the V-ANDSF server indicates that the visited operator has support for WLAN access using an S2a interface. when network access has been acquired from a visited cellular operator and one or more WLANs, wireless local area networks, retrieve a setting that indicates a preference or not for IP (internet protocol) address preservation when switching between cellular and WLAN access; if no preference for IP address preservation is indicated, prefer policies for network selection and routing as indicated by ANDSF, access network and discovery selection faction, information received from an H-ANDSF, home operator ANDSF, server over information received from a V-ANDSF, visited operator ANDSF, serveur; characterized by that the circuitry is further adapted to: if a preference for IP address preservation is indicated, prefer policies for network selection and routing as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server only if the V-ANDSF server indicates that the visited operator has support for WLAN access using an S2a interface. if a preference for IP address preservation is indicated, prefer policies for network selection and routing as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server only if the V-ANDSF server indicates that the visited operator has support for WLAN access using an S2a interface.