One UI Version History: Every Major Samsung Software Update

The One UI version history tracks how Samsung’s software layer, the one that shapes how every modern Galaxy phone looks and feels, has evolved dramatically since its debut. In this guide, our editorial team walks you through the major One UI versions in order, pairs each one with the version of Android it is built on, and highlights the signature features that defined it. By the end you will understand where your own device sits in this timeline and how long Samsung intends to keep it updated.

What Is One UI, and Why Its Version History Matters

One UI is Samsung’s custom interface that runs on top of Google’s Android operating system. It replaced the older Samsung Experience software (which itself succeeded TouchWiz), and it was designed from the ground up to make large-screen phones easier to use with one hand. Every major One UI release is tied to a specific Android base version, so the two version numbers move forward together but are not the same thing. That pairing is why the One UI version history below lists an Android base alongside every release.

One UI 1.0: The One-Handed Foundation

Samsung unveiled One UI 1.0 in late 2018, built on Android 9 (Pie). Its defining idea was reachability: the interface split many screens into an upper viewing zone and a lower interaction zone, pulling buttons and controls down toward your thumb. It also introduced a cleaner visual language, a comfortable night mode, and a focus on reducing on-screen clutter. This release first rolled out to devices like the Galaxy S9 and Note 9, and it shipped on the Galaxy S10.

One UI 2 and 3: The Refinement Years

The next two generations in the One UI version history polished the foundation rather than reinventing it.

• One UI 2.0 arrived on Android 10, refining gesture navigation, expanding a system-wide dark mode, and adding stronger privacy and permission controls.
• One UI 3.0 moved to Android 11, bringing a redesigned notification panel, a refreshed lock screen, and smoother animations across the system.

As is typical for Samsung, smaller point updates (such as 2.1, 2.5, and 3.1) landed between the major versions to add features tied to new hardware.

One UI 4 and 5: The Material You Era

With Android 12, Google introduced its Material You design philosophy, and Samsung embraced it in its own way.

• One UI 4.0 was based on Android 12 and added a color-theming system that could pull an accent palette from your wallpaper, along with a privacy dashboard and expanded customization.
• One UI 5.0 shipped on Android 13, introducing stackable widgets, deeper personalization, and the Modes and Routines system for automating device behavior.

One UI 6 and the Arrival of Galaxy AI

One UI 6.0 was built on Android 14, delivering a redesigned quick settings panel, a new default font, and interface refinements aimed at speed and clarity. Its point release, One UI 6.1, is notable as the version that introduced Samsung’s Galaxy AI suite to flagship devices in early 2024, bringing AI-assisted tools for translation, writing, and search into everyday use.

One UI 7 and the Galaxy AI Era

The newest generation in the One UI version history, One UI 7, is based on Android 15 and represents one of the most significant visual and functional refreshes in years. It leans heavily into the Galaxy AI experience while modernizing the overall look of the interface. Because this generation is still maturing and expanding across the Galaxy lineup, we describe it in broad terms here: expect a heavier emphasis on on-device intelligence, refined widgets and layouts, and continued design polish. Always check your specific model to confirm exactly which One UI and Android version it currently runs.

How Long Will Your Galaxy Stay Updated?

One of the biggest advantages of the modern Galaxy lineup is longevity. For its recent flagship phones and select mid-range models, Samsung has committed to as many as seven years of major OS upgrades and seven years of security updates. Older devices generally received shorter windows, so the exact commitment depends on your model and its release year. This long support period means a single phone can move through several One UI generations over its lifetime.

Keeping Your Software Healthy

Whether you update normally through Settings or reinstall firmware manually with a tool such as Odin, it is critical to use software that exactly matches your device’s model number and region (CSC). Flashing the wrong build, or interrupting a flash midway, can corrupt the software or permanently brick your phone. One reassuring note: installing official stock firmware does not trip Samsung’s Knox security flag, whereas custom or unofficial software can trip it permanently and disable protected features such as Samsung Pay and Secure Folder.

Before you begin any manual firmware operation, work through these precautions in order:

1. Confirm your exact model and region. Check your model number in Settings, then download the firmware that matches it and your region code (CSC) precisely.
2. Back up your data. A firmware flash can wipe the device, so save your photos, contacts, and files first.
3. Charge the battery. Aim for a comfortable charge level so the phone cannot die mid-process.
4. Use a reliable cable and port. A stable connection helps prevent interruptions during the transfer.
5. Never disconnect mid-flash. Do not unplug the cable, close the tool, or power off the phone until the process reports success.

If you ever need to reinstall a clean, official build for your exact device, you can download the correct official stock firmware for your specific model and region from ZipFirmware, so you always flash the right software with confidence.

Common Questions About the One UI Version History

Is a higher One UI number always a newer Android version?

Not exactly. One UI and Android use separate numbering, but each major One UI release maps to a specific Android base, as listed above. A point release like 6.1 shares the same Android base as 6.0.

Why does my phone show an older One UI than the newest one?

Update availability depends on your model, region, and carrier. Newer versions roll out in waves and reach supported devices first, so timing varies.

Can I skip a One UI version?

Often yes. If your device sat without updates, a single update may jump you across multiple versions at once, straight to the latest build it supports.

Conclusion

From the one-handed simplicity of One UI 1.0 on Android 9 to the Galaxy AI era on Android 15, the One UI version history shows software that has grown steadily more capable while staying recognizable. Knowing which version your phone runs, and which Android base sits beneath it, makes updating and maintaining your Galaxy far less confusing. When it is time to reinstall, always match the firmware precisely to your device and keep the process safe from start to finish.