Since this discussion seems to be specific to 3gpp use of SIP I suggest
you continue this discussion in some 3gpp-specific forum.
On 5/11/20 7:50 PM, ankur bansal wrote:
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
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