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Samsung Galaxy S21 Android 13/One UI 5.0 final testing underway, expect Stable update next week - Sammy Fans
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Samsung One UI 5.1 Comes to Current Galaxy Devices Alongside Newly Announced Galaxy S23 Series – Samsung Global Newsroom
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Stable One UI 5 Update Available For Samsung Galaxy S21, S21+, and S21 Ultra [Download Full Stock Firmware] : r/S21Ultra
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