To erase your Apple Watch without using your iPhone, follow the below process;

  1. On your Apple Watch, tap Settings > General > Reset > Erase All Content and Settings.
  2. Enter your password if prompted.
  3. For GPS + Cellular models, select whether you want to keep your cellular plan or remove it.
    • If you plan to pair your Apple Watch and iPhone again, keep your plan.
    • If you don’t want to pair your Apple Watch and iPhone again, select the option to remove your plan. If you aren’t going to pair with a different watch or iPhone, you might need to contact your carrier to cancel your cellular subscription.
  4. Tap Erase All to reset your Apple Watch to the factory settings.
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