No audio with smartphones. [SOLVED]

Hi, i’m Kristjan and i’m quite new to this. I have an network praxis, so one task was setting up VOIP. I decided to use FreePBX. Everything seemed to work already, using X Lite program on pc and Sipdroid on android smartphone and Media5-fone on iPhone. I can easily make calls between pc and any phone, evertything seems to work. But but… If i make call between any smartphone, I get no audio.

Edit: I used different network for my pc what wasn’t on same network with server, and no audio between pc and phone either. So problem seems to be with that.

Thank you

Check your firewall settings.

Got everything working, I realized the problem was in an outer network.
The ports were not transmitted.

Anyway everything is working now, thanks anyway