Question: In which state does the MME enter after a successful routing area updating or combined routing area updating procedure if ISR is not activated or deactivated?
Option 1: EMM-REGISTERED
Option 2: EMM-DEREGISTERED
Option 3: EMM-IDLE
Option 4: EMM-CONNECTED
Explanation: According to the 3GPP specification, if ISR (Idle mode Signaling Reduction) is not activated or deactivated during a routing area updating or combined routing area updating procedure, the MME enters the state EMM-DEREGISTERED after the successful completion of the procedure. This indicates that the UE is detached and the MME has no EMM context or the EMM Context is marked as detached.