Apple Watch SE 3 40mm

*AT&T 5G requires compatible plan and device. Coverage not available everywhere. AT&T 5G+ is offered in limited locations in specific cities. Device will display 5G+ coverage indicator when used in an area where 5G+ coverage is available. To get broad mid-band 5G+ service, you need a band n77 capable device. To get high-band service in AT&T 5G+ Zones, such as venues, airports, and other points of interest, requires approximate unobstructed line-of-sight to the signal source plus a band n260 capable device. Wireless technology varies by device. See Feature and specs above to see this device’s wireless technology capabilities. For coverage details see att.com/coverageviewer. Go to att.com/5Gforyou for details.

**AT&T ended 2G and 3G services on its owned U.S. network. We may offer 2G and 3G when roaming. AT&T also may slow your services to 2G speeds when roaming.

Apple Watch SE 3 requires iPhone 11 or later with iOS 26 or later.

¹The temperature sensing feature is not intended for medical use. Temperature sensing is available only on Apple Watch Series 8 and later and all Apple Watch Ultra models.

²The Vitals app is for wellness purposes only and not for medical use.

³Sleep apnea notifications are available on Apple Watch Series 9 and later, Ultra 2 and later, and SE 3. The feature is intended to detect signs of moderate to severe sleep apnea for people 18 years old or older without a diagnosis of sleep apnea.

⁴Irregular rhythm notification requires the latest versions of watchOS and iOS. It is not intended for use by people under 22 years old or those who have been previously diagnosed with atrial fibrillation (AFib).

⁵Battery life varies by use and configuration. See apple.com/watch/battery for more information.

⁶Testing conducted by Apple in July and August 2025 using preproduction Apple Watch SE 3 (GPS + Cellular) and Apple Watch SE 2 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease software, Apple Watch Magnetic Fast Charger to USB-C Cable (Model A2515), and Apple 20W USB-C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage, and environmental factors; actual results will vary.

⁷Fast charging is compatible with Apple Watch Series 7 and later, any Apple Watch Ultra model, and Apple Watch SE 3.

⁸Requires an Apple Intelligence-enabled iPhone nearby and Bluetooth headphones with device and Siri language set to English. Apple Intelligence is available in beta. Some features may not be available in all regions or languages. For feature and language availability and system requirements, see support.apple.com/en-us/121115.