Hello,

received and rport are added when the client is behind NAT. Can you paste here the capture for the case that doesn't work? It will help us to see what is wrong there, and if not, could be that the mobile operator does some SIP ALG which breaks/blocks the sip, in this case you have to switch to tls.

Cheers,
Daniel

On 05/02/16 07:35, Gholamreza Sabery wrote:

I am using Kamailio 4.1.x with NAT enabled. When I want to REGISTER using my desktop client which is Linphone everything is find with any username. But on Android some users can REGISTER and someusers can not. I captured SIP packets and the only difference between packets on Android devices and packets on Desktop client is that on my desktop "received" and "rport" are not added by Kamailio in response messages. Any idea on what is happening here?
_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com
http://miconda.eu