Apple Watch has become one of the most recognized and widely used smartwatches in the world. With each release, Apple has introduced new features, improved designs, and enhanced performance. But with so many models and series released over the years, it can be difficult to identify the exact series of a specific Apple Watch model number. One such model is the Apple Watch A1859. If you’ve come across this model number and are wondering what series it belongs to, this article will help you understand its place in the Apple Watch lineup.
This guide provides a comprehensive explanation of the Apple Watch model A1859, including its series classification, specifications, features, and compatibility. The article is structured to make the identification process clear and to help you understand the key differences between various Apple Watch generations.
Let’s dive into the details.
Apple Watch Model Numbers: A Quick Overview
Apple assigns a unique model number to each version of its devices. These model numbers are often printed on the back of the watch case or can be found in the settings menu. They help users, developers, and technicians identify the exact variant of a device.
For Apple Watches, the model number begins with the letter “A” followed by four digits. These numbers are not always intuitive, which is why many users are unsure which series their watch belongs to based solely on the model number. Understanding the model number is the first step in determining which features your watch supports and what updates it can receive.
What Is the Apple Watch Model A1859?
Apple Watch model A1859 is part of the Apple Watch Series 3 lineup. It was released in September 2017 and represents one of the cellular-enabled variants of Series 3. This particular model is designed to work with LTE networks, allowing it to operate independently from an iPhone for certain functions.
More specifically, A1859 is the GPS + Cellular version of the 42mm Apple Watch Series 3. It was tailored for specific regional markets and carrier bands. Apple produced various versions of the Series 3 watch to ensure compatibility with LTE networks around the world.
Key Features of Apple Watch Series 3 (Model A1859)
Cellular Connectivity
Model A1859 includes built-in LTE capabilities. This allows users to make calls, send texts, stream music, and receive notifications without needing to have their iPhone nearby. It requires a compatible cellular plan to activate these features.
S3 Processor
The Series 3 features Apple’s S3 dual-core processor. This chip offers faster app performance, smoother interface interactions, and improved efficiency compared to the previous generation.
W2 Wireless Chip
The Apple-designed W2 chip enhances Wi-Fi and Bluetooth performance. It provides 85% faster Wi-Fi and is 50% more power-efficient than the previous generation.
GPS and Altimeter
The Series 3 includes built-in GPS and a barometric altimeter. These features are essential for tracking distance, pace, elevation gain, and outdoor workouts without needing to carry an iPhone.
Water Resistance
Model A1859, like other Series 3 models, is water-resistant up to 50 meters. It is suitable for swimming and water-based workouts but not for deep-sea diving or high-velocity water activities.
watchOS Support
When launched, the Series 3 ran on watchOS 4. Over the years, it received several updates and is currently supported up to watchOS 8. However, newer updates beyond this version are not available for Series 3 models due to hardware limitations.
Design and Display
Display
The Apple Watch Series 3 features a Retina OLED display with Force Touch technology. It provides a bright and clear viewing experience with good sunlight legibility. The 42mm model has a resolution of 312 x 390 pixels.
Case Materials
Model A1859 was available in aluminum. Apple also offered other Series 3 variants in stainless steel and ceramic, but the A1859 specifically was part of the aluminum product line.
Colors and Bands
The aluminum model was available in colors like Silver, Space Gray, and Gold. Users could pair their watch with a wide variety of interchangeable bands, including sport bands, woven nylon, and leather options.
Compatibility and Requirements
iPhone Compatibility
To activate and use an Apple Watch Series 3 with cellular (like model A1859), users need an iPhone 6 or later running iOS 11 or higher. For current use, later iOS versions are recommended.
Carrier Support
Because A1859 includes LTE capabilities, it must be paired with a carrier that supports Apple Watch cellular plans. Not all carriers provide Apple Watch support, so it’s important to check compatibility before purchasing or activating the watch.
Battery Life and Charging
Battery Performance
The Series 3 delivers up to 18 hours of battery life under typical usage. This includes usage such as receiving notifications, using apps, and brief periods of exercise tracking.
Charging
It uses a magnetic charging cable that connects to the back of the watch. Full charging takes about 1.5 to 2 hours, and it supports overnight charging as part of Apple’s daily-use model.
Health and Fitness Features
Activity Tracking
Like other Apple Watch models, Series 3 tracks movement, exercise, and standing time through the Activity Rings system. It encourages users to stay active throughout the day.
Heart Rate Monitoring
The watch features an optical heart sensor that measures your heart rate throughout the day and during workouts. It also alerts you to unusually high or low heart rates.
Workout App
The Workout app supports various activities, including running, cycling, swimming, and high-intensity interval training (HIIT). The watch tracks calories, duration, pace, and other metrics.
Integration with Health App
Data from the Apple Watch is synced with the iPhone’s Health app. This allows for long-term tracking and analysis of health trends.
Limitations of Apple Watch A1859
No Always-On Display
The Series 3 does not feature an always-on display. The screen turns on only when you raise your wrist or tap the screen.
Smaller Storage
The Series 3 offers 8GB of internal storage for the GPS + Cellular model. This limits the amount of music, apps, and photos that can be stored directly on the device.
Limited Software Updates
As of now, the Series 3 is no longer eligible for the latest watchOS updates. This means users may not receive new features or security patches beyond watchOS 8.
Identifying Your Apple Watch
If you want to confirm whether your Apple Watch is model A1859, follow these steps:
Check the Back of the Watch:
The model number is etched on the back case near the sensors.
Use the Settings App:
- Open the Settings app on your watch.
- Tap “General” > “About.”
- Scroll down to “Model.”
- Tap the model number to reveal the actual model identifier (e.g., A1859).
Once you’ve verified the model number, you can determine that it is a 42mm Series 3 GPS + Cellular version.
Is the Apple Watch Series 3 Still Worth It?
As of 2025, the Apple Watch Series 3, including model A1859, is considered an entry-level option. While it still performs basic smartwatch functions, it may not meet the demands of users who want the latest features, better performance, or longer software support.
Pros
- Affordable second-hand pricing
- Reliable fitness tracking
- Water resistance
- Cellular connectivity
Cons
- Outdated hardware
- Limited software support
- Smaller screen compared to newer models
- Less storage and slower performance
If you only need basic notifications, fitness tracking, and occasional calls, the A1859 model may still serve your needs. However, for those looking for enhanced health sensors, an always-on display, or faster performance, newer models like the Apple Watch SE or Series 7 and above are more suitable.
Conclusion
Apple Watch model A1859 belongs to the Series 3 lineup and is a 42mm GPS + Cellular variant. Released in 2017, it brought significant improvements over previous generations, including LTE connectivity, better performance, and a water-resistant design. While it remains a capable smartwatch for basic tasks, it is no longer the best option for users who prioritize speed, modern features, and long-term software support.
Understanding the specifics of your watch model helps ensure you make informed decisions about upgrades, repairs, or software compatibility. Now that you know what the A1859 model represents, you can better assess whether it suits your needs or if it’s time for an upgrade.
