https://www.androidsage.com/2020/12/22/download-stable-one-ui-3-0-ota-update-for-us-unlocked-galaxy-note-20-ultra-from-t-mobile-verizon-sprint-att/
[Download] Stable One UI 3.0 OTA update for US Unlocked Galaxy Note 20 (Ultra) from T-Mobile, Verizon, Sprint, AT&T