Even though Google only recently launched Android 10, it looks like Samsung is testing the update already. Reportedly, T-Mobile is already testing the update in-house. XDA Developers discovered this within a T-Mobile support page that states the carrier is testing the software to verify that it passes quality standards.
The issue is that these support pages are not always accurate. However, XDA was able to confirm that Samsung is working on the update. As of today, the South Korean company has already tested 11 builds of Android 10 on both the Exynos and Snapdragon Galaxy S10 series. As well as a single Android 10 test build on the Exynos Galaxy Note 10.
Reportedly, Samsung has not performed any internal test builds for the Snapdragon Galaxy Note 10, but will soon.
Samsung is expected to shed more light on the Android 10 and One UI 2.0 update at the Samsung Developer Conference in October. Recently a video showcasing One UI 2.0 hit the web.
This a big step up from when Samsung used to take six months or more to update its devices to the latest version of Android.
Source: XDA Developers