Just like everyone else, I had the same issue with my 2021 VW Atlas Sel Prem. About 2 months ago, my navigation was off track. I would be somewhere and the GPS would display that I was 50 miles away. Similarly, my clock was off by 35 minutes, which later turned into hours as it relies on GPS and I cannot set it manually.
I had issues with my Bluetooth audio during phone calls as I would be able to hear the person clearly however, they couldn't hear my voice.
I took it too the dealership and they said that it was a nationwide issue with the call module and that I would have to wait on a update from VW. They said that they would be air dropping it via the radio towards the end Dec, beginning of Jan 2022. As a engineer in electronics and telecommunications, I found it weird how an update is sent through a radio frequency signal, that too of several megabytes. Maybe I hadn't paid enough attention in class?
Anywho, I told them that in the profession I'm in, I need to have a working car phone. They finally put me on the books. I just got my Atlas back from service and everything finally works! All 3 issues have been resolved. This is what they did (from my receipt):
Customer states people cannot hear him through the microphone please check and advise. Connected to Bluetooth and tested and verified them not being able to hear me. Tried pulling fuse to call module and let sit to reset but no luck there. Ordered call module V.C. H10, LG8, 01S. Removed 5f radio screen and trim to access call module. Ran test plan for replacement coded and then tested system and all is now working as should and ready for customer.
Part: 5WA-035-283
Hope this helps!