AOD

Just been having a little look online for similar issues. S9 is really new so not really anything to report but quite a few with the S8's that had concerns. TMO customers seems to be a pattern too?

https://www.reddit.com/r/GalaxyS8/comments/6mo67i/aod_not_moving_on_tmo_s8s8/

I have Sprint. Yeah, I'm sure it's just because the phone has only been out for a few weeks and that's why there's probably nothing on the AOD clock not moving. If it's moving. It's moving so slow that I can't tell because it pretty much looks like it stays in the same spot for a long time. Without moving up or down. And like what @r511 said, the only time I see it move from a different position is if I was doing stuff on my phone and then let screen go to sleep then it moves to a different spot.
 
doesn't the aod turn off while the phone is face down? this is generally how I keep the phone...im debating shutting it off as well as I have a smart watch
 
Wow! After reading this, I changed my brightness for AOD to the lowest brightness. I don't think I've noticed a screen burn in yet so that's good.

How do you change the brightness on AOD? It appears to adjust automatically.