Apple Watch Series 3: Everything You Need to Know

Apple Watch Series 3

Apple Watch Series 3 is the fourth-generation prototype of the Apple Watch. It introduces significant new features that improve functionality.

The biggest change is cellular connectivity, unlike the Apple Series 2, which had no cellular connectivity. It features a full 4G LTE and UMTS cellular radio that switches seamlessly to cellular when it is away from iPhone.

Apple Watch users are no longer cringe on their iPhone; instead, they can remain connected, stream music, make and receive calls, send and receive texts, and more without having their iPhone nearby.

The Apple Watch Series 3 comes in more than 60 variations ranging from $329 – $1,399. The good news about this is that all these models function practically the same.

Still, there are some crucial differences, especially for those using the Apple Watch Series 3 as a constant companion for safety, fitness, or health purpose.

Looking at the Apple Watch Series 3 mainly for its convenience and functionality, look no further than the base aluminium models. If you’re fashion-conscious, then you may want to splurge on a more expensive Apple Watch.



TypeOLED capacitive touchscreen, 16M colors
Size1.65 inches, 8.6 cm2 (~55.4% screen-to-body ratio)
Resolution390 x 312 pixels


OSwatchOS 4.0, upgradable to 7.0
ChipsetApple S3


TypeLi-Ion 341 mAh, non-removable (1.34 Wh)
ChargingWireless charging
Stand-byUp to 18 h


SensorsOptical heart sensor, Ambient light sensor, Apple Pay, Barometric altimeter, Water-resistant.
ProtectionSapphire crystal glass

If you are trying to show off your style while going for an outing, the Apple Watch Series 3 is an excellent option. When buying an Apple Watch Series 3, these are the four important choices you’ll need to make:

Apple Watch Band and Special Editions

Apple sells special editions of Apple Watch Series 3 models with different bands. Aside from the Apple Watch Edition, there’s also the Apple Watch Nike+ models and several watches that feature the Herm’s bands.

While most of Apple Watch Series 3 models are available in 42mm and 38mm sizes, most of the Herm’s Apple Watches are available in one size.

Cellular or No Cellular

All Apple Watch Series 3 models have GPS installed in them, which allow them to do things like trigger alerts or track workout. Although, only the GPS + Cellular Apple Watch Series 3 models can fully function without a connected iPhone nearby.

Apple Watch Case Material and Color

The four case materials to choose from include steel, aluminium, and ceramic (there are two models made of ceramic).

Apple Watch Size

The Apple Watch Series 3 comes in just two sizes, the larger model meant for those with slightly bigger wrists and the smaller model meant for those with slimmer wrists.

The Apple Watch Series 3 is designed in a way to help people stay connected, stay motivated and active & it claims to have a customer satisfaction rating of 97% worldwide.

The watch can share the same number as the iPhone, so there is no need to provide an additional number to friends, family, or colleagues. Participating carriers help users get familiar with this feature by offering special introductory cellulars plans at launch.

These cellular plans enable the customers to make calls directly from the Apple Watch Series 3 (GPS + Cellular) without getting an additional number and, when paired with AirPods, enjoy a seamless and fully wireless experience.

The Apple Watch Series’s compatibility depends on the version of the watchOS shipped on the device. For the Apple Watch Series 3, it was shipped with watchOS 7 and officially required an iPhone with iOS 14 or later.

Apple introduced an industry-first antenna design that uses the display itself as both a transmitting and receiving element for 4G LTE and UMTS. They also introduced a built-in embedded SIM that is over one-hundredth the size of a traditional SIM card. This makes over-the-air activation possible without compromising space.

The Apple Watch Series 3’s architecture featured a faster dual-core processor, which allows for quicker app launch times and smoother graphics. For the first time, it enables Siri, the voice assistant on Apple devices, to speak using the built-in speaker.

A custom wireless chip called W2 was installed in the Apple Watch Series 3. It was integrated into the Apple S3 SiP. The implementation of the chip makes Wi-Fi 85% faster and Bluetooth 50% more power-efficient than the previous model’s chip design.

Although it still provides all-day battery life and keeping the size virtually the same as before. It also features a barometric altimeter that aids flights, tracking activity, and outdoor workouts, including elevation gain.

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