Section: 5.2.3.2.5 UPDATE-NEEDED
Content: The UE: - shall not send any user data; - shall not send signalling information, unless it is a service request a tracking area updating or combined tracking area updating procedure which is triggered: a) as a response to paging; NOTE: As an implementation option, the MUSIM UE is allowed to not respond to paging based on the information available in the paging message, e.g. voice service indication. b) upon request by the upper layers to establish a PDN connection for emergency bearer services; or c) upon a request from the upper layers for an MMTEL voice call, MMTEL video call, SMSoIP, SMS over NAS or SMS over S102; - shall perform cell selection/reselection according to 3GPP TS 36.304[ Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode ]  [21]; - shall enter the appropriate new substate as soon as the access is allowed in the selected cell for one of the access classes of the UE; and - if configured for eCall only mode as specified in 3GPP TS 31.102[ Characteristics of the Universal Subscriber Identity Module (USIM) application ]  [17], shall perform the eCall inactivity procedure at expiry of timer T3444 or T3445 (see clause 5.5.4).