To reset your Apple Watch, you can follow these steps:
1. Keep your Apple Watch and iPhone close together.
2. Open the *Apple Watch app* on your iPhone.
3. Go to the *My Watch* tab and tap *All Watches**.
4. Tap the *info button* next to the watch that you want to unpair.
5. Tap *Unpair Apple Watch.
6. Tap *Unpair [your Apple Watch name]*.
7. For GPS + Cellular models, choose whether to keep or remove your cellular plan.
8. Type your *Apple ID password* to disable Activation Lock, then tap **Unpair.

If you don't have your iPhone, you can still reset your Apple Watch directly:

1. On your Apple Watch, tap *Settings > *General > *Reset.
2. Tap *Erase All Content and Settings*.
3. Enter your passcode if prompted.
4. For GPS + Cellular models, choose to keep or remove your cellular plan.
5. Tap *Erase All to confirm.

This will reset your Apple Watch to its factory settings. Remember, if you're planning to pair your Apple Watch with a new iPhone, keep your cellular plan. If not, you might need to contact your carrier to cancel your cellular subscription.