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?
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