Starting with the Galaxy S10 Lite, the device is receiving the One UI 2.5 update with the software version G770U1OYM2BTI2 in the US. Samsung has already released the One UI 2.5 for the Galaxy S10 Lite global units.
This update doesn’t bring features unlike the Galaxy S10 and Note 10 series. But it does bring the camera performance improvements. There’s improved Pro mode and wireless DeX support.
Now move to the Galaxy M21, it is getting the One UI 2.1 based on Android 10. The software version of this update is M215FXXU2ATI9. It comes with features such as Quick Share and Music Share. It also includes the September 2020 security patch.
If you want to check for the update manually, just head into the device Settings, tap on the Software update menu and go for the Download and install option.