Hi,
Using latest linphone for Android from the playstore I'm getting a lot of 1 way audio situations which is typical of NAT issues.
Looking further into the Kamailio proxy logs (v 4.2 stable with RTPengine module enabled), I see a bunch of STUN related errors coming from the Linphone UAC:
Not handling potential STUN packet from 89.xx.xx.xx:7076: FINGERPRINT attribute missing
This is likely the cause of the problems. Does Linphone's ICE stack not have full support for RFC 5245 and RFC 5389, specifically the missing Fingerprint attribute which is causing major problems?
Thanks