Hi Ranjit There is no clear specification saying UE should deregister when SIM is removed . But if refer multiple specs , we can reach a point where UE supposed to do it .
As per 3gpp 24.301 5.5.2.1 General *The detach procedure with appropriate detach type shall be invoked by the UE* if the UE is switched off, *the USIM cardis removed from the UE* or the EPS capability of the UE is disabled or the UE wishes to detach for non-EPS services As per FCM0.1 VoLTE Service Description and Implementation Guidelines 3.2.2 VoLTE UE Initiated Detach and IMS Deregistration 3.2.2.1 General *A VoLTE UE shall automatically deregister from IMS before performing an LTE Detach* Even we have seen use-cases where there are services linked with SIM ,and UE can do refresh registration removing those capabilities when SIM is removed . SIM swap anyway will be taken care if UE does IMS deregistration or refresh-registration while SIM is removed. Hope this helps. Regards Ankur Bansal On Sun, May 3, 2020 at 8:37 PM Ranjit Avasarala <ranjitka...@gmail.com> wrote: > Thank you Dale. as part of SIM swap testing, I came across the below > scenario: > the Phone number (MSISDN-1) was registered with IMSI (IMSI-1). when SIM > Swap occurred, the INVITE came with a different IMSI and CSCF sends > diameter SAR with "Unregistered user". But HSS thinks user is registered > and sends SAA with DIAMETER_UNABLE_TO_COMPLY error. CSCF translates this > error to 500 Internal Server Error. > So is this the expected behavior? > > Regards > Ranjit > > On Sun, May 3, 2020 at 9:07 PM Dale R. Worley <wor...@ariadne.com> wrote: > > > Ranjit Avasarala <ranjitka...@gmail.com> writes: > > > Does SIM swap procedure on a SIP UE trigger re-registration? if not > when > > > calls are made from the device, the INVITE would have the IMSI of the > new > > > SIM card? > > > > The answers aren't set by the SIP standards. However, given that the > > SIM gives the Directory Number of a PSTN telephone, I would expect that > if > > you change the SIM on a UE, the UE would register for the new DN. > > > > In SIP, the From address in an INVITE is not necessarily connected with > > any AOR that the UE registers for. But in a PSTN telephone, I would > > expect it to use the SIM's DN as the From URI. > > > > Dale > > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
