As we reported earlier, the Note 10 Snapdragon variants in the United States have already started receiving stable One UI 3 firmware update. Today, Android 11 OTA is hitting Galaxy S10 series devices in the North America for the Snapdragon variants.
A user (u/aurarasburst) in the United States claims to have received OneUI 3.0 firmware update for the regular S10 device. The phone seem to be an unlocked variants, but the model number is SM-G973U. So it could be a carrier unlocked variant.
Furthermore, Sammobile, a repository for Samsung firmware, also has Android 11 downloads available for the Galaxy S10 from Comcast carrier. It features build number G973USQU4FTLN. The same build could roll out to carrier variants. So that brings the build number to G970USQU4FTLN for the S10e, and G975USQU4FTLN for the S10+.
We can expect other carries in the United States including T-Mobile, Sprint, Verizon, AT&T to release Android 11 OTA in the following week. Same goes for the unlocked variants like Galaxy S10e (SM-G970U/U1), S10 (SM-G973U/U1), and S10+ (SM-G975U/U1).
You can download the OTA by going to settings > system updates > download OTA update manually. Alternatively, you ca manually download the full stock firmware for your Snapdragon Galaxy S10e, S10, or S10+ device using a free tool called Frija or Samfirm. You should then be able to download and install it using the Odin Flashtool.