According to Telus’ update schedule, the Note 20 and Note 20 Ultra will receive the update on January 5th.
This update will also likely roll out on the same day or within a few weeks if you’re using an unlocked device or on another network.
One UI 3.0 offers a new visual design with improved performance, allowing apps to run faster and perform better. Additionally, One UI 3.0 will offer better customization, a Samsung Keyboard with more languages, a simple Settings page, and improved autofocus and auto exposure.
Go to Settings > Software Update >Download and install > Install Now to get the new update.
Samsung’s S20 series received the update back on December 15th.