Samsung Galaxy S24 & S24 Ultra Receive Android 15-Based One UI 7 Update in Japan – Full Details Inside

Samsung Brings One UI 7 Update to Galaxy S24 and S24 Ultra in Japan

After a long wait, Samsung has finally released the Android 15-based One UI 7 update for the Galaxy S24 and S24 Ultra smartphones in Japan. This marks a significant milestone for Japanese Galaxy fans, as the update arrives nearly two months after its global release. The delay had left many users puzzled, but the rollout is now officially underway.

Galaxy S24 One UI 7 Update Japan – Android 15 Features

The software update comes with the PDA build version ending in BYE3 and includes a wide array of new features, performance improvements, visual redesigns, and the latest May 2025 security patch.

Let’s break down everything that’s new with the One UI 7 update for the Galaxy S24 lineup in Japan.

📅 Update Rollout Timeline and Build Info

• Device Models: Galaxy S24 and Galaxy S24 Ultra

• Region: Japan

• Build Version: Ending in BYE3

• Update Size: Approx. 2.5GB

• Security Patch: May 2025

• Rollout Date: June 10, 2025 (onwards)

• Availability: Gradual, may take a few days to reach all units

Samsung began the global rollout of One UI 7 in April 2025, starting with Korean and European units, followed by the U.S., India, and other key markets. However, the Japanese release was noticeably absent until now, for reasons that remain undisclosed.

The update began rolling out today, and as always, it’s being released in stages. So, some users might get it immediately, while others may need to wait a few more days.

🔧 How to Update Your Galaxy S24 in Japan

Updating your phone is simple. Follow these steps to check and install the One UI 7 update:

1. Open Settings on your phone

2. Scroll down to Software update

3. Tap on Download and install

4. Wait for the phone to connect and fetch the latest OTA

5. Follow on-screen instructions to complete the update

🔐 Tip: It’s always advisable to back up your important data before performing a major software update.

🌟 What’s New in One UI 7?

One UI 7 introduces a fresh Android 15-based user experience tailored for Galaxy devices. It brings a polished design, system-wide performance improvements, new smart features, and updated stock apps.

✅ 1. Redesigned User Interface

The entire UI now feels more fluid, intuitive, and modern. Samsung has overhauled system animations, app icon designs, and menu layouts to improve overall usability.

• Smoother transitions

• Rounded corners for a more refined look

• Updated color palette for consistency

• Enhanced dark mode adaptation

✅ 2. Live Notifications & Now Bar

One UI 7 introduces the Now Bar, a standout feature that shows real-time updates like delivery statuses, music playback, and ride tracking directly on your lock screen, home screen, and status bar. You no longer need to open apps to stay informed.

Live Notifications are richer, dynamic, and more context-aware, giving users control right from the notification panel.

✅ 3. Lock Screen Customization

Samsung has added new customization options for the lock screen, allowing Japanese users to:

• Change clock styles and sizes

• Add custom widgets

• Personalize quick access apps

• Use animation effects

These enhancements align with Samsung’s growing focus on personalization and aesthetic control.

✅ 4. Improved Samsung Weather Widgets

In Japan, where seasonal changes are significant, the revamped Samsung Weather app now offers improved widget layouts, better animations, and more accurate hourly forecasting. The app has been optimized for better battery usage and smoother widget interaction.

✅ 5. Smarter Samsung Keyboard

The built-in keyboard now features:

• Better autocorrect accuracy

• Multilingual prediction improvements

• Voice input enhancements

• Emoji and sticker suggestions based on context

This is great news for users who frequently switch between English and Japanese typing modes.

✅ 6. Battery and Performance Improvements

One UI 7 introduces under-the-hood optimizations that result in better battery efficiency and reduced background CPU usage.

• Adaptive performance based on user behavior

• App sleep mode now more aggressive

• Enhanced thermal management to reduce heating

✅ 7. Privacy and Security

With Android 15 as its base, One UI 7 provides stronger privacy controls:

• Private Space: A secure folder-like feature to hide apps and files

• Permission Checkups: Receive alerts for unused app permissions

• Better control over location, camera, and microphone access

Plus, the included May 2025 security patch addresses critical vulnerabilities, ensuring Galaxy S24 devices in Japan are protected against the latest threats.

📱 Exclusive Japanese Enhancements?

While Samsung hasn’t highlighted any Japan-specific features, Japanese Galaxy S24 users will benefit from localized services and app integration improvements, including:

• Better compatibility with Suica and PASMO (digital transit cards)

• Language optimization for Japanese characters in system UI

• Localized system help guides and widgets

🧪 Looking Ahead: One UI 8 Public Beta Incoming

As Galaxy S24 users in Japan start exploring One UI 7, Samsung is already preparing for its next major update—One UI 8, based on Android 16.

📢 What We Know So Far:

• The One UI 8 Public Beta has already gone live for the Galaxy S25 series in select countries.

• Samsung is expected to unveil One UI 8 at the July 2025 Galaxy Unpacked event in the U.S.

• Public beta expansion is planned for older flagships like Galaxy S24, Z Fold 6, and Z Flip 6.

• However, Japan is not currently included in the beta program, a pattern consistent with Samsung’s historical beta rollouts.

Despite this, One UI 8’s stable release is expected much earlier this year—possibly by October 2025—which means Galaxy S24 users in Japan won’t have to wait too long to get their hands on the next big thing.

💬 Final Thoughts

The release of One UI 7 for the Galaxy S24 and S24 Ultra in Japan is a welcome update that brings the country’s flagship devices up to date with the rest of the world. Though the rollout was delayed, the feature set and improvements make it well worth the wait.

From aesthetic revamps to smart features like the Now Bar and Live Notifications, Japanese users are in for a much smoother, personalized, and secure experience.

And with One UI 8 already on the horizon, it’s clear that Samsung is doubling down on timely and feature-rich software support for its flagship models—cementing its position as one of the most reliable Android OEMs in the world.

📌 Quick Recap

📲 Stay Updated

Follow the latest Samsung software news, beta updates, and tips. Stay informed and ahead of every One UI update, especially with One UI 8 nearing launch.