Samsung resumes One UI 7 for Galaxy S24 after fixing critical unlock bug

Samsung resumed the rollout of the One UI 7 update, based on Android 15, for the Galaxy S24 series, including the S24, S24 Plus, and S24 Ultra, on Thursday, April 17. The company had paused the global distribution the previous week due to a severe bug primarily affecting devices with the Exynos 2400 processor, common in South Korea. The issue, reported by users, prevented normal smartphone unlocking under certain conditions, causing frustration among those eagerly awaiting the new interface. After a swift response, Samsung implemented fixes and released a more stable version of the system, identified as build BYD9, which also addresses issues with the Secure Folder and enhances overall device performance.

The pause, initiated on April 14, marked a challenging moment for Samsung, which faced criticism for delays in delivering the update. One UI 7, officially announced on April 7, promised a revamped interface with advanced artificial intelligence features and greater customization. However, the bug, discovered shortly after the initial rollout in regions like South Korea, the United States, and Europe, forced the company to pull the firmware from its OTA (Over-The-Air) servers. The decision was communicated quietly, with Samsung only confirming the temporary suspension in official forums, such as its South Korean community, where users reported difficulties accessing their devices.

The One UI 7 rollout finally picked up again!https://t.co/xGSPeuPeG5

— Android Headlines (@Androidheadline) April 17, 2025

The resumption of One UI 7 brings relief to Galaxy S24 owners, who can now enjoy the system’s new features. Highlights include enhanced integration with Galaxy AI, a redesigned notification bar, and smoother animations. Samsung also strengthened security with the April 2025 patch, addressing vulnerabilities in features like the Sticker Center and Samsung Device Health Manager Service. Despite the setback, the company remains committed to expanding the update to other models, such as the Galaxy S23, Z Fold 6, and Z Flip 6, in the coming weeks.

Background of the One UI 7 interruption

The suspension of One UI 7 caught many users off guard, especially after months of anticipation. The system, which underwent six beta versions since December 2024, was extensively tested, but the critical bug slipped through initial checks. Reports indicate that the unlocking issue primarily affected Galaxy S24 models with the Exynos 2400 chip, though some Snapdragon 8 Gen 3 units, used in markets like the U.S., also experienced instability. The flaw blocked access to the home screen under specific conditions, such as after reboots or biometric unlock attempts.

Beyond the unlocking problem, another significant issue involved the Secure Folder, Samsung’s security feature for storing files and apps in a protected environment. Users reported that the bug exposed gallery content in automatically generated stories, compromising privacy. These issues, coupled with reports of excessive battery drain, prompted Samsung to act swiftly, halting the global rollout within a week of the initial launch.

On April 16, Samsung issued an official statement apologizing for the inconvenience and promising a fix soon. The new build BYD9, released starting April 17, resolves these issues and improves overall system stability. The company also optimized animation performance and energy consumption, addressing user complaints about sluggishness in early One UI 7 versions.

Key features of One UI 7

One UI 7 introduces several innovations that solidify Samsung’s position in the premium smartphone market. Built on Android 15, the operating system offers a more intuitive interface, emphasizing customization and productivity. Integration with Galaxy AI has been expanded, enabling users to perform complex tasks with simple commands, such as finding pet-friendly restaurants or creating GIFs directly from videos.

• Now Bar: Displays real-time updates on the lock screen, such as workout progress or music details from Galaxy Buds.
• AI Select: Suggests actions based on selected content, streamlining tasks like video editing or file sharing.
• Split notification bar: Separates notifications and quick controls for easier access.
• Optimized animations: Smoother transitions with faster response to user inputs.
• Google Gemini integration: Enables advanced voice commands for contextual searches.

These features, combined with improvements in security and energy efficiency, make One UI 7 a significant upgrade for Galaxy users. Samsung also plans to extend exclusive features, like Log Video, to other devices in the future, though it remains limited to the Galaxy S25 and S24 for now.

User impact and community response

The temporary halt of One UI 7 sparked mixed reactions among users. On forums and social media, many expressed frustration over the delayed Android 15 rollout, particularly since competitors like Google had already delivered the system to Pixel devices months earlier. Samsung, known for its prompt updates on flagship models, faced criticism for failing to catch the bug during the beta phase, which involved thousands of users across multiple countries.

However, the company’s quick response in addressing the issue earned praise from parts of the community. The release of build BYD9, just three days after the suspension, underscored Samsung’s commitment to software quality. South Korean users, the first to report the bug, began receiving the updated version, with markets like the U.S., Europe, and Brazil expected to follow shortly. For AT&T customers in the U.S., the rollout may take longer, as the carrier had not started distribution before the pause.

The One UI 7 experience on devices shipping with the system pre-installed, such as the Galaxy S25 and Galaxy A56, has been positive. Tests on models like the A56 showed no bugs or crashes, suggesting that the issues were tied to transitioning from older versions, like One UI 6. This indicates that Samsung faced specific challenges in adapting the software for older devices, even recent flagships like the Galaxy S24.

Update timeline for other devices

Samsung released a preliminary timeline for expanding One UI 7, covering a wide range of Galaxy devices. Following the resumed rollout for the S24 series, the company plans to update other models through April and May 2025. The schedule includes both flagship and mid-range devices, ensuring most users access Android 15 in the first half of the year.

• April 2025: Galaxy S24 series, Galaxy Z Fold 6, Galaxy Z Flip 6, Galaxy Tab S10 series.
• May 2025: Galaxy S23 series, Galaxy Z Fold 5, Galaxy Z Flip 5, Galaxy S24 FE, Galaxy Tab S9 series.
• June 2025: Galaxy A55, Galaxy A35, Galaxy Tab S8 series.
• July 2025: Galaxy S22 series, Galaxy Z Fold 4, Galaxy Z Flip 4.

This timeline reflects Samsung’s dedication to keeping its devices updated, even amid setbacks like the recent bug. The company is also testing One UI 8, based on Android 16, which could arrive as early as July 2025 for new foldables, such as the Galaxy Z Fold 7 and Z Flip 7. Google’s anticipated Android 16 release in June pressures Samsung to accelerate its development cycles.

Technical challenges and lessons learned

The One UI 7 interruption highlighted the challenges manufacturers face in adapting major system updates. Samsung, which heavily customizes Android with its One UI interface, must balance innovation and stability, especially across devices with varying hardware, like Exynos and Snapdragon chips. The unlocking bug, for instance, was more pronounced in Exynos models, raising questions about software optimization for different processors.

Another critical issue was the Secure Folder flaw, which undermined trust in a privacy-focused feature. Samsung acted quickly, but the incident underscores the need for more rigorous testing, particularly for sensitive functionalities. The company has announced plans to review its quality control processes to prevent similar issues, potentially expanding the beta program to cover more use cases.

The One UI 7 experience also illustrates the complexity of managing global updates. With millions of devices across regions and carriers, Samsung must coordinate rollouts precisely to ensure each market receives a stable version. The pause, though frustrating, was a prudent move to avoid broader damage to user experience and brand reputation.

Future expectations for One UI

With the One UI 7 resumption, Samsung aims to rebuild user confidence and reinforce its leadership in software updates. The company has a strong track record of long-term support, offering up to seven years of updates for recent models like the Galaxy S24 and S25. This commitment sets it apart from competitors like Xiaomi and Oppo, which typically provide shorter support periods.

The coming months will be critical as Samsung expands One UI 7 to dozens of models, including tablets and mid-range smartphones. The company is also investing in new AI features, expected to shine in future updates. Galaxy AI already enables capabilities like real-time translation and advanced photo editing, and Samsung plans to integrate more AI-driven tools in One UI 8.

The anticipated Android 16 release in June 2025 adds pressure for Samsung to expedite One UI 8 development. Reports suggest the company is already testing the new system on devices like the Galaxy S25 and upcoming foldables. Interestingly, some power users have ported a leaked One UI 8 version to models like the Galaxy S23 and A54, reflecting the community’s enthusiasm for Samsung’s software.

Eligible devices and update recommendations

The list of One UI 7-compatible devices is extensive, spanning flagships to mid-range models. Beyond the Galaxy S24 series, devices like the Galaxy S23, S22, Z Fold 6, Z Flip 6, Tab S10, and A55 are confirmed to receive the update. Samsung also included older models, such as the Galaxy S21 and Z Fold 3, ensuring users of devices launched years ago benefit from Android 15.

To ensure a smooth update, Samsung recommends users follow these steps before installing One UI 7:

• Back up data: Use Samsung Cloud or an external service to save photos, videos, and settings.
• Check storage: Ensure the device has at least 5 GB of free space.
• Update apps: Keep all apps updated to avoid compatibility issues.
• Charge the device: Start the update with the battery above 50% or plugged in.

These precautions minimize risks during the update process, which can take 20 to 40 minutes depending on the model and internet connection. Samsung also advises users to regularly check software settings to download the new build as soon as it’s available.

Global expansion and regional outlook

The One UI 7 resumption began in South Korea, but Samsung is rapidly expanding to other markets. In the U.S., users on carriers like T-Mobile and Verizon have started receiving the update, while AT&T is expected to follow soon. In Europe, countries like Germany and the UK are also prioritized. In Brazil, the update is anticipated to arrive by late April, starting with unlocked and carrier models.

Samsung plans to roll out One UI 7 in phases, focusing on high-demand markets first. In the Middle East, for instance, the update will continue through July, covering models like the Galaxy A35 and A55. The company is closely monitoring user feedback to adjust the schedule, ensuring each region receives a stable software version.

The One UI 7 resumption is a significant milestone for Samsung, which aims to overcome initial challenges and deliver a high-quality software experience. With fixes in place and a clear timeline, the company is well-positioned to meet user expectations and maintain its dominance in the smartphone market.