@userJzwQFHQu7g if by any chance you have sim card other than tmobile even if it's non-active try to insert that and update the device through wifi and see if works.. If doesnt then have to wait for samsung release.
Don't they always? The carriers are gate keepers... (More like turn keys to updates). And they have been treating the unlocked users like second class citizens... Even though you pay all out for it... 🙄