No call established

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Using android 10 (up to date pixel3a).  Zoiper (2.10.5) rings, I answer, and get no audio in either direction.  This happens on BOTH lte ( and on my wifi (if i try returning the call the same audio problem happens).  Some days, with NO setting changes, it will work...  I have rport set for nat, push is used with tls on and sip+rtp. The voip provider is (tls enabled) and the incoming calls are showing as answered.  I have tried the various combos for nat (stun, and the two rport options).  How can this be debuged?

asked Nov 12, 2019 in Android by edtoml (120 points)  

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