Some links on this page are affiliate links: if you buy through them we may earn a commission, at no extra cost to you.
Samsung’s first post-launch update for the Galaxy Watch8 and Galaxy Watch8 Classic began rolling out in South Korea on August 6, 2025. It was a small maintenance release for bug fixes and system stability—not a major feature upgrade—and it kept the watches on the May 2025 security patch. A separate update later delivered the August security patch.
What the first Watch8 update included
Launch-period reporting identified firmware ending in AYG4 for the Galaxy Watch8 and Galaxy Watch8 Classic, with an approximately 164 MB download. These are reported build endings rather than complete firmware strings; the full package can differ by country, connectivity model and carrier.
| Device | Reported firmware ending | Approximate download | Initial availability |
|---|---|---|---|
| Galaxy Watch8 | AYG4 | 164 MB | South Korea, reported August 6, 2025 |
| Galaxy Watch8 Classic | AYG4 | 164 MB | South Korea, reported August 6, 2025 |
| Galaxy Watch Ultra (2025) | BYG4 | 158 MB | Related but separate package |
Android Headlines reported the AYG4 and BYG4 rollout details. The Watch Ultra entry is included for context only: its BYG4 package should not be treated as interchangeable with Watch8 or Watch8 Classic firmware.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallWhat changed—and what did not
Bug fixes and stability work
The release was described as addressing bugs and improving general system stability during the watches’ early life. No detailed Samsung changelog was established for individual fixes, so it is not possible to attribute a particular crash, sensor issue or pairing fault to AYG4.
#1 Best Overall
- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 2-Year Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
No confirmed feature expansion
Available coverage did not verify a new health function, redesigned interface, major One UI Watch capability or measurable battery-life improvement. Owners should view AYG4 as maintenance software rather than a substantial Wear OS 6 or One UI 8 Watch expansion.
It was not the August security update
The first release left the watches on the May 2025 security patch. That does not by itself establish that the watches were unsafe, but it does mean “first software update” and “August security update” were different events.
Rank #2
- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 2-Year Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
On August 23, 2025, SamMobile reported a separate update carrying the August 2025 security patch. The Watch8-series firmware in that report ended in AYH7; its availability was confirmed in Korea, not universally across every market.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →How to check for the update
- Open the Galaxy Wearable app on the paired Android phone.
- Open the connected watch’s settings and select Watch settings.
- Tap Watch software update.
- Select Download and install if Samsung offers a package.
Menu wording can vary slightly with the Galaxy Wearable app version and your region. Samsung distributes watch firmware in stages, so a South Korean release report does not mean the same build was immediately downloadable in the United States, Canada, Europe or every LTE carrier market.
Rank #3
- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 2-Year Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
Prepare before installation
- Charge the watch and phone adequately; keep the watch on its charger during installation when possible.
- Keep the watch close to the paired phone and use a stable Wi-Fi connection.
- Do not force-restart the watch or remove it from power while the software is being installed.
- Allow time for rebooting and post-update optimization, then check the software screen again if the result is unclear.
If the update does not appear
Work through these checks before assuming there is a fault:
- Confirm that Galaxy Wearable is connected to the correct Watch8 or Watch8 Classic.
- Reopen the app and install any available Galaxy Wearable update.
- Check whether the watch already has the newest build Samsung is offering for its region and model.
- Try again later; staged rollouts can take time.
- Restart both phone and watch, then repeat the software-update check.
- Verify the exact watch variant. Bluetooth/Wi-Fi, LTE and carrier models can use different firmware, as can different countries.
Changing the phone’s region, using a VPN or factory-resetting the watch is not a verified way to force a rollout. Avoid sideloading a package from another country unless you have a verified, model-matched file and understand the possibility of failed installation or service complications.
Rank #4
- WHY GALAXY WATCH8 CLASSIC: Timeless design.* New lug system for easy band detachment & replacement.* Advanced health & sleep tracking features for total body wellness.* Improved user interface.* Personal AI assistant for hands free help.¹* 2-Yr Warranty
- BUILT TO PERFORM. DESIGNED TO IMPRESS: Show off your style with an iconic design that blends tradition with cutting-edge innovation.¹ A brighter screen makes everything easy to see, and a rotating bezel gives you access to your favorite apps
- YOUR EVERY COMMAND, RIGHT ON YOUR WRIST: Get a little extra help with day-to-day tasks. Galaxy Watch 8 Classic features a personal AI assistant¹ that helps you get things done hands-free. Simply speak the command and your Watch makes it happen
- UNLOCK THE SECRETS TO BETTER SLEEP: When you get good sleep, it feels like anything is possible. Start each day with more energy and better focus using Advanced Sleep Coaching² - improved with even more ways to help you sleep smarter
- QUICK UPDATES, AT A GLANCE: Get updates, select apps and more with Now Bar³,⁴ and an improved user experience. Now Bar conveniently puts the info you use the most - like weather, news and more - right on your main Watch screen
Update timeline
| Date | Event |
|---|---|
| July 2025 | Samsung launched the Galaxy Watch8 series alongside its latest foldables. |
| August 6, 2025 | AYG4 maintenance firmware for Watch8 and Watch8 Classic was reported in South Korea. |
| August 23, 2025 | A separate report identified an August-security release ending AYH7 for the Watch8 series. |
Sources: Android Headlines and SamMobile.
Compatibility reminder for buyers and owners
Samsung’s product information says Galaxy Watch8 requires a smartphone running Android 11.0 or later with at least 1.5 GB of memory; it is not intended for iPhone use. See Samsung’s specifications at the Galaxy Watch8 product page.
Free tools Windows power users keep installed
One-click scans. No signup required.
Because AYG4 was a stability patch, its existence alone is not a reason to buy the watch or switch from an older model. Install it when it is officially offered for your exact watch, but do not expect it to contain the later August security patch or a major new feature set.
Quick Recap
Best Value
![Samsung Galaxy Watch 8 (2025) 40mm LTE Smartwatch, Cushion Design, Fitness Tracker, Sleep Coaching, Running Coach, Energy Score, Heart Rate Tracking, Silver [US Version] (Renewed)](https://m.media-amazon.com/images/I/31cmvlZ2HTL._SL160_.jpg)
- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 90 days Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
