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One UI 4 allegedly draws near with the sighting of a Galaxy S21 Ultra on new software - NotebookCheck.net News
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Samsung officially starts rolling out One UI 4 with Android 12 for the Galaxy S21 family - GSMArena.com news
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How to download and install One UI 4.1 (Android 12) on Samsung Galaxy S21 phones [Video] - Sammy Fans
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