Recommended Free Tools
Yes—the Galaxy Watch 4 LTE and Galaxy Watch 4 Classic LTE received Samsung’s One UI 8 Watch update, based on Wear OS 6. But “finally” needs context: Samsung’s rollout began in 2025 and arrived in stages, with LTE models generally following Bluetooth versions. Availability still varies by exact model, country, and mobile operator.
Samsung’s firmware records list One UI 8 Watch for Galaxy Watch 4 models, including build R870XXU1JYK4 for one Galaxy Watch 4 variant, released on December 22, 2025. That date is not a universal LTE release date; regional and carrier records can differ. (Samsung firmware records)
As an Amazon Associate I earn from qualifying purchases.
What the Galaxy Watch 4 LTE update actually is
One UI 8 Watch is Samsung’s smartwatch software, built on Wear OS 6. It is not the phone-focused Android One UI 8 update. The Galaxy Watch 4 originally launched in 2021 with Wear OS 3 and One UI Watch 3, so this is a substantial platform update for the older watch.
Samsung began rolling out One UI 8 Watch to the Galaxy Watch 4 family in October 2025. Later firmware records show that at least some models continued receiving maintenance updates, including build R870XXS2JZE1, listed with the May 5, 2026 security patch. (SamMobile’s LTE rollout report; Samsung’s firmware page)
#1 Best Overall
- 👉2-Pack Convenient Spare Charger: Comes with 2 chargers in one pack, which can be used in various ways. Long, lightweight and compact enough fit in travel, home and office, such as night stand, desk, end table, car, camper and motorhome etc. You can carry it in your bag at any time in case you forget an extra charger
- 👉Wide Compatibility: Autallgee smart watch charger is compatible with Samsung Watch such as 8, 8 Classic, Ultra, 7, 6, 6 Classic, 5, 5 Pro, 4, 4 Classic, 3, as well as Active 2, Active, FE. [Watch 8(40mm/44mm), Watch 8 Classic(46mm), Watch Ultra (47mm), Watch 7 (40mm/44mm), Watch 6 (40mm/44mm), Watch 6 Classic (43mm/47mm), Watch 5 Pro (45mm), Watch 5 (40mm/44mm), Watch 4 (40mm/44mm), Watch 4 Classic (42mm/46mm), Watch 3 (41mm/45mm), Watch Active 2 (40mm/44mm), Watch Active 1 (40mm), FE(40mm) ]. 【Note: Not compatible with Samsung Watch 9/Ultra 2, Galaxy Gear S and Galaxy Fit】
- 🌳【Carbonfree Certified】Autallgee watch charging cables are Carbonfree Certified. Carbonfree Certified by ClimeCo, which certifies consumer products based on a cradle-to-grave assessment to determine the carbon footprint of the product and associated carbon emission reductions. Everyone contributes to the world’s carbon emission problems
- 👉Safe Charging: Build-in short-circuit protection IC in this charger to avoid overvoltage and overcurrent, also premium quality copper wire ensure charging Samsung Galaxy Watch to full 100% safety and reliability. Please Note: (1) Use only a standard 5V power adapter. (2) Ensure the adapter is safety-certified. (3) Operate the product in a dry, room-temperature environment.
- 👉Precise & Strong Magnet: builting-in magnet charging module, the magnet was strong enough, holds your watch in place precisely and automatically without any hassle. Charge at a touch,that's simple
Which Watch 4 models are covered?
- Galaxy Watch 4 Bluetooth/Wi-Fi
- Galaxy Watch 4 LTE
- Galaxy Watch 4 Classic Bluetooth/Wi-Fi
- Galaxy Watch 4 Classic LTE
The exact firmware build is tied to the model number and region. Do not assume that a build reported for the Bluetooth SM-R870 model is also the correct build for an LTE model such as SM-R875F. Samsung warns that update details can vary by device, country, and service provider. (Samsung’s Galaxy Watch 4 LTE firmware record)
Why LTE owners had to wait
Samsung has not established a single hardware-related explanation for the delay. The more defensible explanation is rollout complexity: LTE watches require additional carrier certification, regional testing, cellular configuration, and operator approval. Samsung can therefore release Bluetooth and LTE firmware separately, and an update available in one country does not prove that every carrier has approved it.
In practical terms, a missing update notification does not necessarily mean your watch is excluded. It may simply mean that your model or carrier is still on a different release schedule.
What One UI 8 Watch adds
Now Bar
The Now Bar places ongoing activities at the bottom of the watch face. It is intended to make active information easier to check and provide quicker access to related controls, without requiring as much navigation through apps.
Rank #2
- Proven Compatibility: Compatible with Samsung Galaxy Watch Watch 8┃Ultra 47mm (SM-L705U)┃Watch 7 40mm (SM-L300NZ)┃Watch 7 44mm (SM-L310NZ)┃Watch FE 40mm (SM-R861)┃Watch 6 40mm(SM-R930)┃Watch 6 44mm (SM-R940)┃Watch 6 Classic 43mm (SM-R950)┃Watch 6 Classic 47mm (SM-R960)┃Watch 5 Pro 45mm (SM-R920)┃Watch 5 40mm (SM-R900)┃Watch 5 44mm (SM-R910)┃Watch 4 40mm (SM-R860)┃Watch 4 44mm (SM-R870)┃Watch 4 Classic 42mm (SM-R880)┃Watch 4 Classic 46mm (SM-R890)┃Watch 3 41mm (SM-R850)┃Watch 3 45mm (SM-R840)┃Active 2 40mm (SM-R830)┃Active 2 44mm (SM-R820)┃Active 1 40mm (SM-R500). Not for Galaxy watch (released in 2018) and Gear S2/S3/S4
- Fast Charging Speed: Intended for your Galaxy Watch 8/7/6/5/4/3,fast charging speed,do not worry this replacement charging cable is wasting precious time
- Enhanced Durability: With 6000+ bend lifespan and reinforced cable joint, this replacement charger for samsung galaxy watch is more than ready to handle the stresses and strains of daily use
- Safety & Reliability: Charging Cord includes built-in over-current, over-voltage, short-circuit and over-temperature protection.Premium Quality Copper Wire and Pin Cold-Plated ensure charging safety and reliability
- What You Get: 1 pack 3.3Ft(1M) replacement charger for Galaxy Watch 8/ultra/7/6/5/4/3,our 12-month customer support and 24-hour friendly customer service
Double-pinch controls
With the double-pinch gesture, you pinch your thumb and index finger together twice to trigger actions. Samsung lists uses such as scrolling through notifications, controlling music, and taking pictures. The gesture can be customized in areas including the watch face, music controller, alarm, calendar, and reminder alerts. (See Samsung’s update notes)
Wear OS 6 underneath
The update also moves the watch to Wear OS 6. However, software cannot add hardware. Features available on newer Galaxy Watch generations may remain unavailable on the Watch 4 because of differences in sensors, processor performance, display hardware, region, phone compatibility, or Samsung Health support.
Do not expect One UI 8 Watch to turn a Watch 4 into a Watch 7 or Watch 8. It does not add newer sensors, guarantee the newest health features, remove LTE carrier requirements, or make the watch compatible with an iPhone.
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 matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11How to install One UI 8 Watch
Before starting, charge the watch. Samsung says an update may require at least 30% battery. Keep the watch paired to the phone over Bluetooth and use a reliable network connection.
Rank #3
- for galaxy watch charger Compatibility: Galaxy Watch 8/8 Classic/7/6/6 Classic/5/5 Pro/4/4 Classic/3/ Active Ultra/Active 2
- This 3.3Ft Watch fe charging cable is convenient to carry around, especially for traveling,and is suitable as a backup charger for cargador de reloj samsung galaxy watch .
- for galaxy watch 7 charger Advance Safety:-Built-in safeguards with over-current, over-voltage, short-circuit and over-temperature protection and other safety features. Guards your device battery against overcharge damage.
- for galaxy watch 6 charger Safe and Fast Watch Charging- Our charger provides a safer and faster charging mode, for a more perfect charging experience,Please take off the watch case.
- Considerate service of one-year warranty and thirty-day return and refund, provides you with perfect shopping experience.
- Open the Galaxy Wearable app on the paired Android phone.
- Tap Watch settings.
- Tap Watch software update.
- Tap Download and install.
- Follow the prompts and allow the watch to restart.
Menu labels can vary by model and software version. You can also check from the watch itself: Settings → General → Software update. Samsung’s current update guidance is available in its official support instructions.
How to confirm that it installed
Do not rely only on the notification headline. Check the software information in Galaxy Wearable or on the watch and look for:
- Wear OS version: 6
- One UI Watch version: 8
- A firmware build matching your exact model and region
A routine security update can appear separately from the major interface upgrade, so the words “security patch” alone do not confirm that One UI 8 Watch is installed.
No update available? Try this first
If One UI 8 Watch does not appear, work through these steps:
Rank #4
- 【Complete Charging Kit for Daily Use】 This charging set includes a 3.3FT/1M magnetic charging cable and a 5V 1A USB power adapter, providing a convenient replacement charger solution for your Samsung Galaxy Watch. Ideal for bedroom, office, travel, and everyday charging needs.
- 【Safe & Stable Overnight Charging】 Designed with a reliable 5V 1A output, this charger provides steady power for your smartwatch. The stable charging performance makes it a great choice for overnight charging on your bedside table, helping keep your watch ready for the next day.
- 【Secure Magnetic Connection】 The magnetic charging puck automatically aligns with your Galaxy Watch for a simple and secure connection. Just place your watch on the charger and enjoy a convenient charging experience before bedtime.
- 【Perfect 3.3FT/1M Cable Length】 The 1-meter charging cable provides comfortable reach from bedside tables, nightstands, desks, and other common charging locations. Keep your charging area neat while enjoying flexible placement.
- 【Wide Compatibility with Galaxy Watch Series】 Compatible with Samsung Galaxy Watch 8, Galaxy Watch7, Galaxy Watch6 Classic, Galaxy Watch6, Galaxy Watch5 Pro, Galaxy Watch5, Galaxy Watch4 Classic, and Galaxy Watch4. Please check your watch model before purchase.
- Confirm that the watch is paired in Galaxy Wearable.
- Update Galaxy Wearable and the watch plug-in.
- Install any available phone operating-system update.
- Place the watch on its charger and retry.
- Use a reliable Wi-Fi or mobile-data connection.
- Check the exact model number, country, and carrier.
- Restart both the phone and watch.
- Wait if the update is controlled by your carrier or is still being distributed in phases.
Samsung’s normal update process requires a network connection and Bluetooth connection to the paired phone. Avoid sideloading firmware from an unrelated region unless you understand the risks, including possible incompatibility with LTE service. (Samsung setup and compatibility guidance)
What if the update causes problems?
After installing, monitor battery drain, charging, notification delivery, LTE reconnection, third-party apps and watch faces, performance, and health-measurement availability. A problem may be limited to one app, notification category, or setting rather than the operating-system update itself.
Before considering a reset:
- Back up the watch through Galaxy Wearable.
- Restart the watch.
- Update watch apps through the Play Store.
- Check the affected app or watch face separately.
Factory-reset only as a last resort. A reset erases personal data, and Samsung warns that LTE service may need to be reactivated afterward. If cellular service was activated with a QR code, you may need a replacement code from your carrier. (Samsung reset guidance)
Free tools Windows power users keep installed
One-click scans. No signup required.
Is One UI 8 Watch the Watch 4’s final major update?
It is widely expected to be the Galaxy Watch 4’s final major Wear OS and One UI Watch platform update. That is different from saying that every security or stability patch has ended. Samsung firmware records show maintenance updates continued after the One UI 8 Watch release, but those records do not guarantee a particular future patch schedule or support end date.
Best Value
- 【COMPATIBILITY】The Galaxy Watch Charger is widely compatible with Samsung Galaxy Watch 7 40mm 44mm/ 6 40mm 44m/Galaxy Watch 6 Classic 43mm 47mm/5 40 44mm/5 Pro 44mm/4 40mm 44mm/4 Classic 42mm 46mm,Galaxy Watch 3 41mm/45mm(Not for gear S3),Active 2 40mm 44mm,Active 40mm
- 【Safe and Fast Charging】Built-in magnet,when placed on the wireless charger,Galaxy Watch 7/6/5/4 begins charging,it's that simple.The watch snaps in magnetically for a perfect fit every time.Voltage Regulator and Power protection circuit included ensures steady and faster charging.
- 【DURABILITY】This Galaxy watch 7/6/5/4 charger made of high-quality TPE material,6,000+ Bending Test ensure durability,long lasting and avoid scratching,the smooth polished surface and non-slip base protects your watch from rubbing with added fashion.
- 【Compact Design】Not only for charging cable,but also as charging stand and Sync data connector.All in one charging dock.Simple to charge,just plugs into USB port like laptop,power bank,outlet,wall charger.Compact design for easy storage.
- 【What You Get】1 x Charger dock cable for Samsung Galaxy Watch 7/6/5/4.Be full of confidence to get your backups as there is replacement or fully refund.If received this item in any deffective way,please feel free to contact us.Note: Power is 5V/1.0A
The Watch 4 launched in August 2021, and Samsung’s historical promise of up to four years of One UI Watch and Wear OS updates places Wear OS 6 at the likely end of its major software cycle. (Android Central’s update-cycle context)
Should you keep your Galaxy Watch 4 LTE?
| Situation | Best choice |
|---|---|
| The watch works well and battery life is acceptable | Install One UI 8 Watch and keep using it. |
| Battery life is poor but the features are sufficient | Compare battery-service costs with the price of a newer watch. |
| You want newer health sensors or faster performance | Consider upgrading. |
| You rely on LTE calling or messaging | Confirm carrier compatibility before buying a replacement. |
| You use an iPhone | The Galaxy Watch 4 is not suitable; it cannot be set up with iOS. |
LTE does not make the Watch 4 completely independent. Initial setup requires a compatible Android phone, and standalone calls and messages require an eligible cellular plan. Carrier support varies by country and network. Samsung’s general guidance lists Google Mobile Services and Android compatibility requirements, but an old phone meeting the baseline does not guarantee support for every current feature. (Samsung’s original Watch 4 announcement)
When upgrading makes more sense
Upgrade if the battery has deteriorated substantially, the watch feels slow, LTE or GPS performance is no longer reliable, or you need newer health hardware and a longer support runway. In the US, Samsung’s June 2026 MSRP document lists the Galaxy Watch 7 LTE at $299.99 for 40mm and $329.99 for 44mm, while the Galaxy Watch 8 LTE is listed at $399.99 for 40mm and $429.99 for 44mm. The Watch 8 Classic LTE is listed at $549.99. These are MSRP figures, not guaranteed sale prices. (Samsung’s June 2026 MSRP document)
For an existing owner, the update alone is not a reason to pay full price for a replacement. For someone buying new in 2026, a Watch 7 or Watch 8 is generally the safer long-term purchase unless a Watch 4 LTE is deeply discounted and the buyer accepts that One UI 8 Watch is probably its final major platform generation.
Quick Recap
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.
