The final cut of the 8th episode of the Tesla Motors Club Podcast, featuring Balazs Biro, of the prominent Hungarian EV channel Villanyautósok, is now available. You can watch it now on YouTube or listen to it on all major podcast networks.
This issue has been discussed in other threads. You need to raise the speaker volume to maximum while placing and receiving a call to hear the other person. The holiday update caused this issue. Hopefully it will be corrected in a future software update.