Looking at it now, something's very fishy about OP and the thread, there's only ONE screenshot and it's on the camera app info, it's not even on the software update menu, he describes very few if any worthy details about the update.
Not to mention, he's the only guy so far who has this supposed "Android 10 update" for the Z4 "OTA on Verzion" when everybody else about almost a week later, still hasn't recieved an update.
The lack of any overwhelming proof and only a very few details is what raises a major red flag for me.
And why would a carrier variant of any phone gets an update before the UNLOCKED version? Could be me but that's honestly unusual for that to happen right?
News outlets shouldn't report on this guy for an update on the Z4, I'm feeling he's just spreading false hype.