Trying asterisk on AWS

I am trying to get audio to work on AWS using asterisk 18.14.0

I have enabled the firewall to allow ALL UDP on AWS

My SIP extension has
nat=force_rport,comedia
qualify=yes
allow=ulaw
allow=alaw
allow=gsm
canreinvite=yes

I enable "rtp set debug on" and the console is printing info.

The call comes into my linphone softphone - but I get no audio on my
linphone softphone.
What might I be missing to allow the audio ?
Volume is up.

Thanks

Jerry

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