How does the Apple Watch Series 4 sync with the iPhone 11?
How does that Apple Watch Series 4 sync with the iPhone 11?
[Re-Titled by Moderator]
How does that Apple Watch Series 4 sync with the iPhone 11?
[Re-Titled by Moderator]
I'm not sure I quite understand the question, but it "syncs" through Bluetooth and/or WI-FI when you setup the watch:
Set up your Apple Watch - Apple Support
About Bluetooth, Wi-Fi, and cellular on your Apple Watch - Apple Support
How does the Apple Watch Series 4 sync with the iPhone 11?