Android Question i can not hear remote ring using Sip library

Try to start the audio after calling MakeCall:

Thanks for answering, I already tried that option and I get the following error:

CallError, ErrorCode=-4, ErrorMessage=mPeerSd = null

Then, the app stops working but the call continues until the other party hangs up.

I've checked the documentation. It does say that you need to call StartAudio after the call is established. I don't think that you can do anything before.

I downloaded your example and replace the following:

'Register with the VOIP service
Sip.Initialize2("SIP", "sip:zzz@iptel.org", "xxx")

by: Sip.Initialize2("SIP", "sip:5003@192.168.10.110", "Rg123456")

and..

CurrentCall = Sip.MakeCall("sip:8355@ideasip.com", 30)

by: CurrentCall = Sip.MakeCall("sip:573108712160@192.168.10.110", 30)

and Runs, touch "Make Call", in few seconds my mobile phone rings, but in app not hear, then, if i don't answer my mobile, in the app NO hear "voice mail system, will have cost from this moment, please Leave your message after the tone" only hear when call is stablished (the tone has been played) and minute is billed and voice mail operator's play a message for i record a message.

This is how the native SIP SDK works.