Install One UI 9 on Galaxy S23 and A36: Android 17 Guide

Samsung has started rolling out the stable One UI 9 update based on Android 17 to the Galaxy S23 series and mid-range models like the Galaxy A36. This marks the final major OS upgrade for the S23 lineup, which launched on Android 13.

The rollout began in South Korea in mid-October 2026 and has since reached Europe and other regions. Mid-range devices such as the A36 are also receiving the update in select markets. Check your phone now to see if the update is available.

What One UI 9 Brings to Galaxy Phones

One UI 9 adds a more flexible Quick Panel, a location privacy indicator, and improvements to Samsung Notes and DeX. Galaxy AI features expand on supported devices, though older hardware like the S23 may not receive every advanced AI tool.

You also get Android 17 platform changes such as app bubbles and a system contacts picker. These help with multitasking and privacy. For more on Android 17 betas, see our guide on installing Android 17 QPR3 Beta 2 on Pixel.

How to Check for and Install One UI 9

1. Connect your Galaxy phone to Wi-Fi and charge it above 50 percent.
2. Open the Settings app.
3. Tap Software update.
4. Select Download and install.
5. If the update appears, tap Download.
6. Wait for the download to finish, then tap Install now.
7. Your phone restarts and completes the installation.

The process takes 20 to 40 minutes depending on your connection and the size of the package. Beta testers often receive smaller updates around 500 MB, while full installs for non-beta users can exceed 3 GB.

If the update does not show up, wait a few hours and try again. Samsung rolls out updates in waves by region and carrier.

Key Features to Try After Installing

After the restart, explore these changes:

• Customize the Quick Panel by resizing sliders and separating toggles.
• Look for the blue location indicator in the status bar when apps use your location.
• Open Samsung Notes to test any new redaction or editing tools.
• Check Galaxy AI sections for available features on your model.

On the Galaxy A36 and similar mid-rangers, expect solid UI refinements and security patches. Flagship-only AI tools may be limited.

Tips for a Smooth Update

Back up your data before installing. Use Samsung Cloud or a computer with Smart Switch. Clear some storage space if the download fails.

After installing, check for additional app updates in the Galaxy Store and Google Play. Restart your phone once more if you notice any lag.

Monitor battery life for the first few days. Early reports on S23 devices show normal performance after the update settles.

Conclusion

Installing One UI 9 keeps your Galaxy S23 or A36 current with Android 17 features and the latest security patches. The update is stable for daily use on supported devices.

Check Settings > Software update regularly. If your region has not received it yet, it should arrive soon as the global rollout continues.

Sources

• SamMobile reports on Galaxy S23 and A-series One UI 9 rollouts (October 2026)
• Android Authority coverage of stable One UI 9 expansion
• GSMArena updates on Samsung firmware releases
• Official Samsung software update channels via device settings