Method for establishing an EPS Bearer for a mobile terminal (UE, 200, 400) in a telecommunications network (240, 280, 440, 480), and a packet data network gateway (PGW, 260, 460) receives and analyses a negative response message from a charging system (OCS/PCRF, 270, 470), characterized in that, when an update location procedure of the mobile terminal (UE, 200, 400) is successfully completed in the telecommunications network (240, 280, 440, 480), the packet data network gateway (260, 460) transmits a message (via the signaling gateway, SGW) to a Mobility Management Entity (MME, 220, 420), whereby the message comprises a bearer activation key, the mobility management entity activates an EPS bearer between the telecommunications network and the mobile terminal by using the received bearer activation key.