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One UI 4.0 stable update will start rolling out in December, according to a Galaxy S community moderator - PhoneArena
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Samsung One UI 4.0: Everything you need to know - Eligible devices, features, roadmap, beta/stable update, latest news, and release date - RPRNA
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Samsung suspends One UI 4.0 update for Galaxy S21 series due to Google Play issues - GSMArena.com news
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