Apple Watch
Apple Watch operates primarily in conjunction with the user's iPhone for functions such as configuring the watch, calling and texting, and syncing data with iPhone apps, but can independently connect to a Wi-Fi network for some tasks. LTE-equipped models of the Series 3 and later can independently connect to a mobile network, substantially reducing the need for an iPhone after initial setup. Compatibility with the iPhone depends on the versions of the system software that each is running; as of February 2020[update], new Apple Watches come with watchOS 6 preinstalled, and require an iPhone running iOS 13.
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