[sr-dev] [kamailio/kamailio] volte：401 Unauthorized (#2703)

[King-Osmond]

Hello!

I have a problem about volte.

>  4(4467) INFO: rr [rr_mod.c:515]: pv_get_route_uri_f(): No route header 
> present.
>  4(4467) NOTICE: <script>: PCSCF REGISTER: 
>  Destination URI: <null>
>  Request URI: sip:ims.mnc007.mcc460.3gppnetwork.org
>  4(4467) INFO: rr [rr_mod.c:515]: pv_get_route_uri_f(): No route header 
> present.
>  4(4467) NOTICE: <script>: Source IP and Port: (10.45.0.6:5060)
>  Route-URI: 
>  4(4467) NOTICE: <script>: Received IP and Port: (192.168.107.6:5060)
>  4(4467) NOTICE: <script>: Contact header: 
> <sip:460070000000001@10.45.0.6:5060>;+sip.instance="<urn:gsma:imei:86772304-493882-0>";+g.3gpp.accesstype="cellular2";audio;video;+g.3gpp.smsip;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel"
>  4(4467) INFO: ims_registrar_pcscf [sec_agree.c:296]: 
> cscf_get_security_verify(): No sec
![1617780139(1)](https://user-images.githubusercontent.com/65008453/113834050-f41b2e80-97bc-11eb-8ebb-c669f2fee210.png)
![1617780742(1)](https://user-images.githubusercontent.com/65008453/113834075-fa110f80-97bc-11eb-951c-9a75283ff69a.png)

urity-verify parameters found
![1617781355(1)](https://user-images.githubusercontent.com/65008453/113834098-04330e00-97bd-11eb-8dd3-3ff310df2e7c.png)
[open5gs.tar.gz](https://github.com/kamailio/kamailio/files/6270079/open5gs.tar.gz)


Can you help me see where the problem is？

Thanks!

Tips：About SQN, the SQN is the same at the beginning of the test (Open5GS, 
FOHSS), but when it is found that the sip registration fails, the SQN is 
inconsistent.  If this situation is normal? If it is not normal, how to solve 
it?

open5gs：v2.2.3
kamailio：5.3

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