Key features

  • Temperature Sensor
  • Blood Oxygen Sensor and App
  • Take an ECG Anytime, Anywhere
  • Heart Rhythm Notifications
  • Advanced Safety Features
  • Enhanced Workout App
  • Redesigned Compass App with Backtrack
  • Track Daily Activity
  • Durable IP6X Design
  • Call, Text and Email
  • Stream Music, Podcasts, and Audiobooks
  • Apple Pay
  • Edge-to-Edge Display
  • All-Day Battery Life w/Fast Charging
  • Sleep Stages Tracking
  • watchOS 9
  • 3 Free month of Apple Fitness+

Apple Watch Series 8 45mm features advanced health sensors and apps, so you can take an ECG,1 measure heart rate and blood oxygen,2 and track temperature changes3 for advanced insights into your menstrual cycle.4 And with Crash Detection, sleep stages tracking, and advanced workout metrics, it helps you stay active, healthy, safe, and connected.

*Apple Watch Series 8 45mm requires an iPhone 8 or later with iOS 16 or later.

Discover the all-new Apple Watch Series 8 45mm available from T-Mobile. Explore the features, specs, reviews, and find the available case and band colors for sale today. Get your new Apple Watch Series 8 45mm on T-Mobile’s nationwide 4G LTE network.

Need help with choosing which Apple Watch is right for you? Check out our Apple Watch comparison chart to help you decide based on the features and options of each smartwatch side-by-side.

Apple Watch Series 8 45mm Quick Facts

  • When was the Apple Watch Series 8 45mm released? The Apple Watch Series 8 45mm was released September 16th, 2022.
  • What colors are available for the 45mm Apple Watch Series 8? The Apple Watch Series 8 45mm is available in multiple colors: Scroll to the top of this page to explore colors currently in stock.

1The ECG app and irregular rhythm notification require the latest versions of watchOS and iOS and are not intended for use by people under 22 years old. The ECG app is available on Apple Watch Series 4 or later (not including Apple Watch SE). The irregular rhythm notification is not designed for people who have been previously diagnosed with Afib.
2Blood Oxygen app measurements are not intended for medical use, including self-diagnosis or consultation with a doctor, and are only designed for general fitness and wellness purposes.
3The temperature sensing feature is not a medical device and is not intended for use in medical diagnosis, treatment, or for any other medical purpose.

Additional specs

Battery Description
Built-in rechargeable lithium-ion battery
USB-C Magnetic Fast Charging Cable
Wi-Fi 802.11b/g/n 2.4GHz and 5GHz, LTE,UMTS, Bluetooth 5.0, USB, NFC
S8 with 64-bit dual-core processor
Operating System
Maximum Expandable Memory
0 GB
Wireless Network Technology Generations
3G, 4G LTE
Supported Email Platforms
Apple Mail, POP3, IMAP4, SMTP, Microsoft® Exchange, AOL®, AIM, Yahoo!® Mail, GMail
WEA Capable
Mobile Hotspot Capable
GSM: 850 MHz, 900 MHz, 1800 MHz, 1900 MHz; LTE: 1, 2, 3, 4, 5, 7, 12, 13, 17, 18, 25, 26, 39, 40, 41, 66; UMTS: Band I (2100), Band II (1900), Band IV (1700/2100), Band V (850)
1.36 Ounces
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