If you have a new Apple Watch, you’ll need to pair it with an iPhone. There are a few steps you’ll need to complete before you can use it. This article explains how to automatically and manually pair a new Apple Watch with an existing iPhone, and what to do if pairing isn’t working.
How to Pair and Set Up Your Apple Watch | Apple Support
If you have an existing iPhone and want to connect a new Apple Watch, follow these steps for the fastest setup:
Put your Apple Watch on your wrist. Turn it on by holding down the side button, not the crown.
Hold the watch close to the iPhone.
