I own a samsung note 9 with baseband version of N960NKOU2BRL1. It currently runs on andriod version 8.1.0.
i've tried several times to upgrade it with the software update on the phone but it keeps telling me "the latest updates have already been installed.
Thanks for your inquiry. Once available, updates are released to Carriers and thereafter, it is at the Carriers discretion to release the update to customers. Since updates are released by Carriers in waves, we’re unable to determine when your device will receive an update. We appreciate your loyalty.