I agree with you.
But now I see that after
```
SIP/2.0 180 Ringing
From: <sip:1111@1.2.3.4>;tag=14003117305244
To: <sip:2222@5.6.7.8>;tag=S7nIf9Z
Call-ID: 0KaR2073911201UQbcGhEfDeMek
CSeq: 669313 INVITE Content-Length: 0
Via: SIP/2.0/UDP
1.2.3.4:5060;rport=5060;received=10.56.63.10;branch=z9hG4bK00000005167007511555
Contact: <sip:atpsh-5bf3d61d-2547-1@10.56.42.33>
Record-Route: <sip:KITS1.MSS.LIFE.COM:5060;transport=UDP;lr>
```
I getting BYE from SBC as
```
BYE sip:atpsh-5bf4031e-3f23-1@10.56.42.33 SIP/2.0
From: <sip:1111@1.2.3.4>;tag=14003117305244
To: <sip:2222@5.6.7.8>;tag=S7nIf9Z
Max-Forwards: 70
Via: SIP/2.0/UDP KITS1.MSS.LIFE.COM:5060;branch=z9hG4bK00000016862453278154
Call-ID: 9afY9565014201gpbcGhEfCmGjd(a)KITS1.MSS.LIFE.COM
CSeq: 670210 BYE
Reason: Q.850;cause=16 Content-Length: 0
```
But kamailio sends to Linphone BYE with second route in r-uri
```
BYE
sip:5.6.7.8:5081;transport=tcp;r2=on;lr;ftag=02003459426351;did=96e.f6f2;vsf=AAAAAAoLCAsBCQcKAnVzehQYeHoeYn1jHxpoCWcFCmN4Oj5lcj1waG9uZQ--;vst=AAAAAAoLAQ4DAA4DAHlnYg4HGh59BRloCWcFCmN4Oj5eB04VGlIeDW9uZQ--;nat=yes
SIP/2.0
From: <sip:1111@1.2.3.4>;tag=14003117305244
To: <sip:2222@5.6.7.8>;tag=S7nIf9Z
Max-Forwards: 70
Via: SIP/2.0/UDP KITS1.MSS.LIFE.COM:5060;branch=z9hG4bK00000016862453278154
Call-ID: 9afY9565014201gpbcGhEfCmGjd(a)KITS1.MSS.LIFE.COM
CSeq: 670210 BYE
Reason: Q.850;cause=16 Content-Length: 0
```
How I can got r-uri from original INVITE in this case?
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