Around a week ago AT&T started rolling out the update to Android 11 with One UI 3.0 to its Galaxy Note20 Ultra 5G units, and today both T-Mobile and Verizon have joined in on the fun, for both the top of the line Note as well as the vanilla Note20.
As usual, these rollouts are staged and so it may take a few days (or even weeks) for every single unit out there to receive the coveted update notification. While you keep that in mind, if you're impatient you can always just mash the Download and install button from Settings > Software update.
The downloads weigh in at around 2.5GB, and you're also getting the December 2020 security patch level, unsurprisingly. If you're interested in exactly what the brand new One UI 3.0 brings to the table, read our detailed breakdown here.