The N960U1UEU1ARL1 firmware update (with the Dec 1 security patch) was released today for the unlocked T-Mobile Note9 (N960U1), just a week after it was released for the T-Mobile branded Note9 (N960U).
The release notes mention only security improvements, but the EU1 (as opposed to ES1) in the firmware version indicates that it's not just a security update.
The release notes mention only security improvements, but the EU1 (as opposed to ES1) in the firmware version indicates that it's not just a security update.