To help you better understand what's happening, incoming RTP packets are not reaching your iPhone.Kintaromk2 wrote: ↑ I have contacted fongo support but they haven't been very helpful so far, telling me to switch settings in the app which don't do anything
What setting? Settings-->Advanced Settings-->Troubleshooting-->"Alternate Fongo Connection"? This is the only setting that might help in the app. It's purpose to try to circumvent SIP ALG in routers. I'n not sure that's going to help without also port forwarding using your router. You can try it though.
Just ask them to please force proxy audio for your account. Ask them to check your account.
Probably won't help, but it's worth a shot.
I'm guessing when you're using cellular data, you have two-way audio, right?
Most likely it's a buggy SIP ALG feature that's enabled in your router: https://community.linksys.com/t5/Wirele ... d-p/331478
https://kb.intermedia.net/article/3009
In Asus routers, SIP ALG is called SIP Passthrough. It's found under Advanced Settings-->WAN-->SIP Passthrough
SIP Passthrough is enabled by default, but in my experience, having it on or off does sweet nothing with Fongo Mobile. Fongo Mobile just works with Asus routers.
Last edited by Guest1284983 on Sep 20th, 2016 1:59 am, edited 1 time in total.