All-day battery life is based on the following use: 180 time checks, 180 notifications, 90 minutes of app use, and a 60-minute workout with music playback from Apple Watch via Bluetooth, over the course of 36 hours Apple Watch Ultra (GPS + Cellular) usage includes a total of 8 hours of LTE connection and 28 hours of connection to iPhone via Bluetooth over the course of 36 hours.Check /watch/cellular for participating wireless carriers and eligibility. Contact your service provider for more details. Wireless service plan required for cellular service.
Not all features will be available if the Apple Watch is set up through Family Setup. If your iPhone isn’t nearby, your Apple Watch needs to be connected to a known Wi-Fi network and you must set up Wi-Fi Calling. To use Emergency SOS on an Apple Watch without cellular, your iPhone needs to be nearby. Apple Watch Ultra (Cellular), Apple Watch Series 8 (GPS + Cellular), and Apple Watch SE (GPS + Cellular) can use a cellular connection for Emergency SOS. The temperature sensing feature is not a medical device and not intended for use in medical diagnosis, treatment, or for any other medical purpose.