“Whether you’re new to the Apple Watch, or are upgrading from the previous generation, it’s unclear how to pair an Apple Watch with a new iPhone. Follow along for some tips and tricks regarding how to pair your Apple Watch when upgrading your iPhone.
You’ll need to un-pair your Apple Watch from your old iPhone. To do this, head into Apple Watch app on iPhone > tap your Apple Watch up top > tap the i symbol, and then Unpair Apple Watch.
If Find my Apple Watch is enabled, you’ll need to enter your Apple ID password in order to unpair the Watch.
Wait for the Apple Watch to unpair. This may take upwards of half an hour depending on how much data is on your Apple Watch so make sure you make the time and have adequate charge on your Watch. You’ll see an Apple logo with a ring around it on your Apple Watch, indicating that it is unpairing from your iPhone. You may see this screen several times as the Watch is unpairing. To confirm that the Apple Watch is completely unpaired, you’ll see a Welcome to Apple Watch screen on the Watch itself.
Once unpaired, go to your new iPhone, head into the Apple Watch app, and tap Start Pairing. If you’re on iOS 11, a card will automatically appear on your iPhone’s screen requesting to pair. Simply tap continue to start pairing.”…