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
