Expect update to Android 10 around when new S models will be released (around February). Check update history of S9, S10. The bulk of Samsung’s Android 10 updates to land in early 2020
T-Mobile S10 and Note 10 Series are already on Testing Phase for Android 10. So stay tuned!
I have a T-Mobile Note 10+ and I am eagerly awaiting the new beta but I don't know where to register to get it. Do I even have to register or will it prompt me to download it on the main Samsung members app ?