Samsung has confirmed the Galaxy S23 series, Z Fold 5, Z Flip 5, and 2023 A-series phones — including the A54, A34, and M54, will not receive Android 18 or One UI 10. One UI 9, based on Android 17, is their final major OS upgrade. It began rolling out to the S23, S23+, and S23 Ultra in South Korea on October 14, 2026, reached Europe days later, and landed on the Z Fold 5 and Z Flip 5 in the US on October 23.
The S23 FE is still pending its One UI 9 release, per Samsung’s current schedule. A Samsung support rep reportedly confirmed the cutoff in August, telling tipster Tarun Vats that “your last One UI update will be One UI 9.” That lines up with Samsung’s original 2022 promise: four major OS upgrades and five years of security patches for select devices.
Launched on Android 13 in early 2023, the S23 series used its four slots on Android 14, 15, 16, and now 17. Same for the Z Fold 5, Z Flip 5, and listed A- and M-series models, and the Tab S9 series, which also ends its major Android updates this year.
Security patches continue through 2028 for all these devices, matching the five-year window from launch. The October 2026 patch alone fixes 79 vulnerabilities. But carriers may delay those monthly updates, some only ship quarterly, so locked devices could see slower coverage over time. Banking apps, work email, and other security-sensitive services increasingly rely on up-to-date patches, making 2028 the hard stop for safe, supported use.
Samsung’s policy shift came with the S24: seven OS upgrades and seven years of security support, but it does not apply retroactively. The S24, S25, S26, and newer foldables are all still on track for Android 18 and beyond. The S26 already runs One UI 9 and is slated for support until 2033.
One UI 9 brings a more customizable Quick Panel, DeX and Notes improvements, new accessibility tools, and a location privacy indicator. But Galaxy AI features added in One UI 9, including My FanCam, Now Nudge, custom Now Brief cards, and Call Brief, are absent from the S23 line and S23 FE.
Only one AI feature made the cut for the S23 Ultra: scrollback for live Interpreter conversations. And while you can skip installing One UI 9, you can’t uninstall it, it’s Samsung’s Android skin, not an app. Third-party launchers only replace the home screen and app drawer. Some S23 owners reported permanent green or pink display lines after the earlier One UI 8.5 rollout in May, a reminder that late-stage software updates carry real hardware risks.
If you’re on a 2023 Galaxy, your upgrade path is closed. Your next phone isn’t just about new features. It’s about staying within Samsung’s active security perimeter.
MDFiled by The Mobile Desk
Phones from leak to launch to price cut: what was announced, what it costs where, and when it goes on sale. Indian launches and prices included, not appended.
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