A used Galaxy S23 still has security time, not Android 18
One UI 9 is the fourth and last major upgrade Samsung promised the Galaxy S23. Security patches should run into early 2028. The S23 FE is on a later clock.
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2 publishedOnePlus Android 17 ships ColorOS. OxygenOS is the option
Stable Android 17 on OnePlus 15, 13 and Pad 4 is ColorOS 17. Europe can stay on OxygenOS for now. Rollback files are still unannounced.
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