Samsung Galaxy A31 one of the Best selling 2020 smartphone Now getting One UI 3.1 based on Android 11 update. Samsung Galaxy A31 was announced in March 2020 with One UI 2.1 based on Android 10 and its the First Major Update.
The Latest update comes with a update in firmware version to A315NKSU1CUD3 which also includes April Security update. The update size is around 2 GB and comes with a lot of New Features. To know More about you can check out One UI 3.0 and One UI 3.1 here.
Currently the update is rolling out in South Korea. And as usual its rolling out to a small user base. It should be getting wider roll out in coming weeks both regionally and globally.
You can check software update manually by going to Settings > Software Update > Check for Updates.