I originally had this in the galaxy sectin but posted here for better visibility since is not specific to that device
I know this has been a while since brought up but wanted to see if anyone had any luck.
With my calls forwarded conditionally to my Google voicemail and connected to T-Mobile everything works OK and people can leave me messages on my Google voice account.
However if I use WiFi calling instead ofthecalls forwarding to Google voice the T-Mobile voicemail will answer the call.
Anyone yet found a workaround for that yet?