How Do I Wipe My Apple Watch to Sell It?
If you’re planning to sell your Apple Watch, you should pair the watch from your iPhone and then wipe away all your personal data to protect your own privacy. To do that, you’ll need to have your iPhone and your Apple Watch near each other. Then: Before your watch is entirely unpaired, Apple will create a new backup, which you can use to set up a new watch or restore the one you’re erasing. When the backup is complete, it will erase the data. Once you see the Start Pairing message, you know the process is done.
How to Erase Your Apple Watch From the Watch
Alternatively, you can wipe your Apple Watch directly from the watch, as well.
How Do I Get Rid of Someone Else’s Apple ID on My Apple Watch?
Unfortunately, there is no way for you to remove someone else’s data from an Apple Watch. If you purchase a previously-owned Apple Watch, make sure the seller has reset it to the factory default and removed the Activation Lock using the instructions above before the watch leaves the original owner. If the original owner does not do it, then the device is unusable.
