Section: 5.2.2 UE behaviour in state EMM-DEREGISTERED 5.2.2.1 General
Content: The state EMM-DEREGISTERED is entered in the UE, when: - the detach or combined detach is performed either by the UE or by the MME (see clause 5.5.2); - the attach request is rejected by the MME (see clause 5.5.1); - the tracking area update request is rejected by the MME (see clause 5.5.3); - the service request procedure is rejected by the MME (see clause 5.6.1); - the UE deactivates all EPS bearer contexts locally (see clause 6.4.4.6); - the UE is switched on; - an inter-system change from S1 mode to non-3GPP access is completed and the non-3GPP access network provides PDN connectivity to the same EPC; or - the UE attached for emergency bearer services is in EMM-IDLE mode and its periodic tracking area update timer expires (see clause ). In state EMM-DEREGISTERED, the UE shall behave according to the substate as explained in clause 5.2.2.3.