A method in a mobility management entity, MME, for controlling an attach procedure of a mobile entity to a packet switched network, the mobile entity belonging to a group of mobile entities which are accessing the packet switched network using a specified access point, the method comprising the steps of: - receiving an attach request message for one of the mobile entities, - transmitting an update location request message to a subscriber database where subscriber related profiles of said group of mobile entities are provided, - receiving a response message from the subscriber database, the response message including PDN gateway information indicative of a PDN gateway associated with or to be associated with said group of mobile entities, the response message further including a maximum bit rate information for a bearer used for data transmission over said packet switched network using said specified access point, - selecting a new PDN gateway if - said one mobile entity is the first member of the group that is attaching to the packet switched network and - the PDN gateway information included in the response message comprises no information suitable to identify a PDN gateway associated with or to be associated with said group of mobile entities, or comprises information allowing selection of a new PDN gateway, - initiating a bearer setup of a bearer meeting said maximum bit rate information contained in the response message, comprising selecting a serving gateway and transmitting a create session request message to said serving gateway for said PDN gateway including said PDN gateway information, said maximum bit rate information, and said group identity information, - sending selected PDN gateway information to the subscriber database if a new PDN gateway has been selected, and - receiving a create session response message including at least said group identity information from said serving gateway for said PDN gateway. - receiving an attach request message for one of the mobile entities, - transmitting an update location request message to a subscriber database where subscriber related profiles of said group of mobile entities are provided, - receiving a response message from the subscriber database, the response message including PDN gateway information indicative of a PDN gateway associated with or to be associated with said group of mobile entities, the response message further including a maximum bit rate information for a bearer used for data transmission over said packet switched network using said specified access point, - selecting a new PDN gateway if - said one mobile entity is the first member of the group that is attaching to the packet switched network and - the PDN gateway information included in the response message comprises no information suitable to identify a PDN gateway associated with or to be associated with said group of mobile entities, or comprises information allowing selection of a new PDN gateway, - said one mobile entity is the first member of the group that is attaching to the packet switched network and - the PDN gateway information included in the response message comprises no information suitable to identify a PDN gateway associated with or to be associated with said group of mobile entities, or comprises information allowing selection of a new PDN gateway, - initiating a bearer setup of a bearer meeting said maximum bit rate information contained in the response message, comprising selecting a serving gateway and transmitting a create session request message to said serving gateway for said PDN gateway including said PDN gateway information, said maximum bit rate information, and said group identity information, - sending selected PDN gateway information to the subscriber database if a new PDN gateway has been selected, and - receiving a create session response message including at least said group identity information from said serving gateway for said PDN gateway.