As reported for other carriers, ARJ5 is 438.90 MB, has the Oct. 1 security patch level, and lists various camera improvements (but not a fix for the camera-freeze problem). Camera version is now 8.5.05.25.
The ARJ5 update is not yet documented on T-Mobile's Note9 support page. I have the SM-960U1 model (US unlocked), but the update is presumably available for the carrier-branded model too.
The ARJ5 update is not yet documented on T-Mobile's Note9 support page. I have the SM-960U1 model (US unlocked), but the update is presumably available for the carrier-branded model too.