If the VLR receives a "Process Access Request" request in response to a "Page" or "Search for MS" operation, after successful authentication, if required, it checks the indicator "Location Information Confirmed in HLR". If this indicates "Not Confirmed" the VLR triggers an "Update Location" to the HLR as described in clause 4.2.1 d). When the HLR receives the "Update Location" request it stores the VLR number, MSC number and LMSI in the subscriber record as for normal operation. If the "Forward Check SS Indication" service is implemented, the HLR checks the indicator "Check SS". If this indicates "Check Required", after successful completion of the subscriber data retrieval procedure that ran embedded in the "Update Location" procedure the HLR sends a "Forward Check SS Indication" to the VLR and marks the subscriber record "Check Not Required". When the VLR receives the "Forward Check SS Indication" request it forwards an indication to the MS to alert the user that supplementary service parameters should be checked.

When the VLR receives a request from an MS (MS originated call, mobile originated Short Message, call-independent supplementary service activity or location registration request) whose IMSI record is marked "Location Information Not Confirmed in HLR", it will perform an "Update Location" to the HLR as described in clauses 4.2.5 and 4.2.7 above. When the HLR receives an "Update Location" request from the VLR, it proceeds as described in clause 5.2.1.

When the ProSe Function receives a request for ProSe Service from a UE whose associated context is marked as "Subscriber Data Not Confirmed by HSS", it shall initiate a "ProSe Subscriber Information Retrieval" request to the HSS as described in the TS 29.344. When the HSS receives a "ProSe Subscriber Information Retrieval" request from the ProSe Function, it shall proceed as described in the TS 29.344.

Upon receipt of a HLR/HSS reset, the SGSN shall mark each relevant MM contexts as invalid and shall set the Non-GPRS Alert Flag (NGAF) if an SGSN - MSC/VLR association exists. After detection of any activity (either signalling or data) from a marked MS or any other implementation dependent trigger for a marked MS in PMM-CONNECTED state with Direct tunnel, the SGSN performs an update location to the HLR/HSS as in the attach or inter-SGSN RA update procedures and, if NGAF is set, the procedure of "Non-GPRS Alert" is followed (see clause 7 in TS 29.018). The update location procedure and the procedure towards the VLR may be delayed by the SGSN for a maximum operator configuration-depending time period to avoid high signalling load.

Upon receipt of a HSS reset, the MME shall mark each relevant MM contexts as invalid and shall set Non-EPS Alert Flag (NEAF) if an MME - MSC/VLR association exists. After detection of any activity (either signalling or data) from a marked UE or any other implementation dependent trigger for a marked UE in ECM-CONNECTED state, the MME performs an update location to the HSS as in the attach or inter-MME TA update procedures and, if NEAF is set, the procedure of "NON-EPS Alert" is followed (see clause 5.3 in TS 29.118). The update location procedure and the procedure towards the VLR may be delayed by the MME for a maximum operator configuration-depending time period to avoid high signalling load.

When the V2X Control Function receives a request for V2X Service from a UE whose associated context is marked as "Subscriber Data Not Confirmed by HSS", it shall initiate a "V2X Subscriber Information Retrieval" request to the HSS as described in the TS 29.388. When the HSS receives a "V2X Subscriber Information Retrieval" request from the V2X Control Function, it shall proceed as described in the TS 29.388.