Insert Subscriber Data procedure, is used to add or modify the HSS user profile in the MME. Here, Operator Modifies UE Subscription profile in HSS modifying EPS subscribed QoS (QCI, ARP) and the subscribed UE-AMBR and APN-AMBR, with UE-AMBR Modified only. So, The HSS Initiated Subscribed QoS Modification Procedure ends after completion of the UE Context Modification Procedure. The eNodeB acknowledges the bearer modification to the MME with a Bearer Modify Response (EPS Bearer Identity) message. With this message, the eNodeB indicates whether the requested EPS Bearer QoS could be allocated or not. In this scenario eNodeB indicates that the requested bearer QoS could not be allocated.