Last week the Samsung Galaxy Watch4 and Watch4 Classic started receiving the One UI 5 Watch update, which is based on Wear OS 4. In India this update enabled Samsung Pay support on the older watches. However, users are reporting issues with this. The One UI 5 Watch update enables Samsung Pay on the Galaxy Watch4 series, but there is an issue After successfully installing Wear OS 4 software, the watch will suggest installing the Samsung Pay app. You can do that, but there is a mismatch of some kind going on as your phone won’t see this as the latest software version and will tell...
Source: https://www.gsmarena.com/latest_update_enables_samsung_pay_on_the_galaxy_watch4_series_in_india_but_its_bugged-news-59861.php