Hi Tony
While I was out last week I made a detour to a dealer that had an Audya, (Used) taking the leaflet/brochure with me, I then asked him to demonstrate all the features on the leaflet/brochure, which he did, I then asked him the OS number and he said it was 3, so as you can see, it does everything that the leaflet/brochure promised. (I told the dealer I would have to think about it as I wasn’t sure if it was for me, thus allowing me a graceful exit)
The additional features that OS4 will bring are just a bonus.
Regards

Bill