A friend of mine with a Fongo app installed tried calling me on my Fongo number yesterday .
I could hear him very clearly but he was not able to hear me .
We are both using Pixel 3a's .
I tried calling him back with the same results
I called him again using a landline (non-Fongo) and had the same results
SMS texts work fine
We later connected using Whatsapp video calling and that worked fine.
Any suggestions on what is happening?