There are certain ways to disconnect your Apple watch without using iPhone and one of them you can find it below. With these steps, You can very easily learn the process of how do I unpair my Apple watch.
1. Go to the Settings of your Apple Watch
2. Visit the General option
3. Scroll down and click the Reset button and later choose ‘Erase All
4. Content and Settings’ option
5. Now, enter your password to verify yourself and again click Erase All option
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