How to Unpair Apple Watch and iPhone on the Phone
You might want to unpair your Apple Watch from your iPhone if you plan to sell or give away the watch or if you plan to get a newer watch. Here’s how to unpair your Apple Watch using the iPhone. A copy of your Apple Watch data is backed up to the iPhone before it is erased. The unpairing process takes a few minutes because the data on the watch is backed up to your iPhone. When your Apple Watch reboots to the language-choice screen, you’ve completed unpairing it from your iPhone.
How to Disconnect Apple Watch and iPhone Using the Watch
You can also unpair the Apple Watch using the watch itself. Doing so returns the watch to factory settings, but it doesn’t remove Activation Lock. To do that, you must unpair the watch using the iPhone as described above. To unpair the two devices on the watch without removing Activation Lock:
What to Do When Upgrading to a New iPhone
If you plan to upgrade your phone following this unpairing process, make a backup of the old phone. When you unpaired your Apple Watch from the phone, as described above, the data from your Apple Watch was backed up on your phone. Activate the new iPhone and restore the backed-up data (which includes the watch data) onto it. Follow the standard steps to pair your Apple Watch with your new iPhone when the new phone is set up.
