wifi calling in Pixel 4a 5g, I can't hear

Might be an issue with corporate network setting - (need to open some ports)

Seemed to fix my issues..

https://www.t-mobile.com/support/coverage/wi-fi-calling-on-a-corporate-network#fourthheading

Same issue with my pixel 4a 5g.  Disabled wifi calling completely.

Pixel 5a on Tmobile network.  Occasionally, phone calls have no incoming audio.  By the comments in this thread, it seems like I need to troubleshoot by working through all combinations of:

∆  Experimenting with network types (i.e., 4g, LTE, 5g) 

∆  Experimenting with reception types (i.e., cellular only, wifi only, cellular and wifi both enabled)

∆  Experimenting with call origin (did I initiate the call, or was it an incoming call)

∆  Experimenting with using the speakerphone function versus non-speakerphone.

∆. type of phone on the other end (is it some weird iPhone thing).

This is ridiculous.   How is it that a cellphone can't do the most basic function...phone audio.  It's in the name:   cellPHONE.   C'mon people.

Google wifi here with the issue.  Verizon FiOS ISP. Router issue perhaps?

This is a problem for me, as well, with my Pixel 4A 5G.  Very annoying and unacceptable.  Disabling Wi-Fi isn't an option for me as T-Mobile coverage is so poor here that I can't use the cellular network for calls.

Is everyone using Google Wi-Fi? I can’t remember if this happened when I was using my ISPs router or not.

Yup same.  My specifics is that my 5G signal, well, TMobile signal all together, is week near at my location.

I'll turn wifi calling off, but miss regular calls.  With wifi calling on, I can receive a wifi call, pick it up, I can't hear anything, bit while the call is still active, turn off wifi completely, the call switches to cellular and it works.

This works until I realize because my cellular signal is garbage, I miss a call.

Have any of you tried changing the preferred cellular network connection type to not 5G, so LTE?

same issue Pixel 5 - wifi calling outbound works, inbound answers call with no audio - turning wifi off in the call is enough to get the audio working

I'm having the same issue, with a pixel 3 and 5 on Wifi.  In contrast to others' experience I find that turning off wifi mid-call is sufficient to get the audio from the other side back.  No device restart is needed. 

Having the same issue with my Pixel 5. There are times when I'm on a call using wifi calling and all of a sudden I can't hear the other person. I turn my wifi off and I'm able to hear again just fine and continue the call. 

I've come across where I have wifi turned on, but not connected to any wifi signal and still have the problem.  I was on the road and making a call, I couldn't hear who I called but they could hear me. I turned my wifi off on the phone and I could hear the other person fine.

I have this issue with a Pixel 5a, I had this phone on Verizon briefly and had zero problems with WIFI calling.  It just seems broken with T-Mobile.  Sometimes I even need to turn WIFI off with cellular calls.