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Samsung is updating the Galaxy J8 to Android 9 Pie, the new firmware also includes One UI. This is the new direction for Samsung's custom interface, you can see a minute-long introduction here. The Galaxy J8 also received the April security patch. Like most of its siblings, the phone is on a quarterly update schedule, so expect the next security update in three months. The update - version J810FPUU3BSD1 - is rolling out in Russia and should expand to other regions soon. Source
Source: https://www.gsmarena.com/samsung_galaxy_j8_joins_the_pie_club_with_new_update-news-36437.php