A telecommunications network including: a mobile device; a home network with which the mobile device user has a subscription including content filtering preferences, the home network including a content filtering policy preference store for storing the content filtering preferences, and home authentication means for performing authentication of the mobile device; and a further network having at least one access point with which the mobile device can communicate and further authenticating means for controlling registration of the mobile device with the access point; wherein: the further network is connected to the home network for communication therebetween; and the further authentication means is operable to communicate with the home authentication means to perform an authentication process for the mobile device when the mobile device connects to the access point, which authentication process accesses data from the content filtering policy preference store storing the user content filtering preferences, determines if the further network can satisfy the content filtering preferences, and controls registration of the mobile device with the access point in dependence upon whether the further network can satisfy the content filtering preferences of the user. a mobile device; a home network with which the mobile device user has a subscription including content filtering preferences, the home network including a content filtering policy preference store for storing the content filtering preferences, and home authentication means for performing authentication of the mobile device; and a further network having at least one access point with which the mobile device can communicate and further authenticating means for controlling registration of the mobile device with the access point; wherein: the further network is connected to the home network for communication therebetween; and the further authentication means is operable to communicate with the home authentication means to perform an authentication process for the mobile device when the mobile device connects to the access point, which authentication process accesses data from the content filtering policy preference store storing the user content filtering preferences, determines if the further network can satisfy the content filtering preferences, and controls registration of the mobile device with the access point in dependence upon whether the further network can satisfy the content filtering preferences of the user. the further network is connected to the home network for communication therebetween; and the further authentication means is operable to communicate with the home authentication means to perform an authentication process for the mobile device when the mobile device connects to the access point, which authentication process accesses data from the content filtering policy preference store storing the user content filtering preferences, determines if the further network can satisfy the content filtering preferences, and controls registration of the mobile device with the access point in dependence upon whether the further network can satisfy the content filtering preferences of the user.