Section: 5.7.6 Handling of Wild Card APN
Content: When the wild card APN is present in the subscription context, the UE is authorized to connect to APNs which are not present in the subscription context. When a request is received for registering a PDN GW ID and there is no PDN subscription context with this APN, the nodes (HSS/MME/ S4 SGSN) shall store the PDN GW ID - APN relation for the UE. When a request is received for deregistering of PDN GW ID and there is no PDN subscription context with this APN, the nodes (HSS/MME/S4 SGSN) shall delete the PDN GW ID - APN relation from the list of APN - PDN GW ID relations.