One UI 8.5 Beta and Security Patch Updates Released This Week (Dec 21-28)

This week has been quite busy for Samsung. The company pushed the One UI 8.5 Beta 2 for the Galaxy S25 series, released the December 2025 security patch for many devices, and significantly expanded One UI 8.5 internal testing. Last updated on December 27.

Samsung expanded One UI 8.5 beta, One UI 8.5 testing, and December 2025 security update this week

Earlier this week, Samsung rolled out One UI 8.5 Beta 2 (ZYLF) for the Galaxy S25, S25+, and S25 Ultra in regions like Korea, Germany, the US, and the UK. At the same time, India and Poland joined the beta program and received Beta 1, which is technically the same as Beta 2 in other regions. Here’s all the One UI updates released this week.

Also, Samsung added several budget, midrange, and tablets to the One UI 8.5 internaltesting phase. This week marked the first appearance of One UI 8.5 test builds for Galaxy M series and F series devices. Some key models spotted this week include the Galaxy M54, Galaxy M17, Galaxy F17, Galaxy A25, Galaxy A33, Galaxy A35, Galaxy A53, Galaxy Tab S11 series, and Galaxy Tab S8 series. You can check the list of Galaxy devices for which a One UI 8.5 test build has appeared here.

In the wearable segment, Samsung also rolled out One UI 8 Watch. The Galaxy Watch 4 received the update in India and Europe, while the Galaxy Watch 4 Classic got the update in the United States.

Meanwhile, the December 2025 security patch saw a wide rollout across Samsung’s lineup. The update covered over 35 Galaxy devices, including flagships, foldables, budget phones, and tablets. The December 2025 security patch addresses around 68 security vulnerabilities. Now, these are the devices that received the December 2025 patch this week.

S series

• Galaxy S23 (India, Turkey, United States)
• Galaxy S23+ (India, Turkey, United States)
• Galaxy S23 Ultra (India, Turkey, United States)
• Galaxy S23 FE (India, Europe, United States)
• Galaxy S24 FE (India, Nepal, Bangladesh)
• Galaxy S22 (Turkey, United States, Singapore)
• Galaxy S22+ (Turkey, United States, Singapore)
• Galaxy S22 Ultra (Turkey, United States, Singapore)

A series

• Galaxy A54 (India, Europe, Turkey)
• Galaxy A53 (India, Europe, Turkey)
• Galaxy A35 (United States)
• Galaxy A33 (Europe, Turkey, Thailand)
• Galaxy A17 4G (Turkey, Iraq, the UAE)
• Galaxy A26 (Egypt, Iraq, Saudi Arabia)
• Galaxy A16 5G (Europe, the UAE, United States)
• Galaxy A16 4G (Europe, Turkey, Thailand)
• Galaxy A15 5G (Europe, India, United States)
• Galaxy A15 4G (Turkey, Thailand, Malaysia)
• Galaxy A13 (Europe)
• Galaxy A07 (Thailand, Vietnam, the Philippines)
• Galaxy A06 4G (India, Nepal, Sri Lanka)
• Galaxy A05 (Turkey, Malaysia, the Philippines)
• Galaxy A04s (Europe, Turkey, Thailand)

M series

• Galaxy M55 (India, Nepal, Sri Lanka)
• Galaxy M53 (Europe, India, Indonesia)

Z series

• Galaxy Z Fold 4 (India, United States)
• Galaxy Z Flip 4 (India, Brazil, Nepal)
• Galaxy Z Fold 5 (India, Turkey, Thailand)
• Galaxy Z Flip 5 (India, Turkey, Thailand)

Tablets

• Galaxy Tab S8 (Europe, India, Turkey)
• Galaxy Tab S8+ (Europe, India, Turkey)
• Galaxy Tab S8 Ultra (Europe, India, Turkey)
• Galaxy Tab S9 FE (India, Taiwan, the UAE)
• Galaxy Tab S9 FE+ (India, Egypt, Saudi Arabia)
• Galaxy Tab S10 FE (India, Thailand, Vietnam)
• Galaxy Tab S10 FE+ (India, Singapore, Sri Lanka)
• Galaxy Tab A9 (Europe, Turkey, Thailand)

XCover series

• Galaxy XCover 5 (Thailand, Vietnam, the Philippines)

Interestingly, the Galaxy M34 received the November 2025 security patch in India and Sri Lanka, while the Galaxy F34 also picked up the November patch in India, which is a bit unusual given the December rollout for most models.

If you own any of the Galaxy devices mentioned above, you can manually check for updates by heading to Settings > Software update > Download and install. Once the download is complete, tap Install now.