Use your paired iPhone
If you have your iPhone, you can use the Apple Watch app to remove the passcode from your Apple Watch. After you remove the passcode, you need to set up your Apple Watch again and restore from a backup.
- Keep your Apple Watch and iPhone close together until you complete these steps.
- Open the Apple Watch app and tap the My Watch tab.
- Tap General > Reset.
- Tap Erase Apple Watch Content and Settings, then tap again to confirm. You might need to enter your Apple ID password.
- For Apple Watch Series 3 (GPS + Cellular) and Apple Watch Series 4 (GPS + Cellular), choose to keep or remove your cellular plan:
- If you want to pair your Apple Watch and iPhone again, keep your plan.
- If you don't want to pair your Apple Watch and iPhone again, 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.
- Wait for the process to finish, then set up your Apple Watch again. When asked, restore from a backup.
Use your Apple Watch
If you don't have your paired iPhone, you can still remove the passcode from your Apple Watch.
- Keep your watch on its charger until you complete these steps.
- Press and hold the side button until you see Power Off.
- Firmly press the Power Off slider, then lift your finger.
- Tap Erase all content and settings.