Hi there, see this on how to reset your apple watch
Keep your Apple Watch and iPhone close together as you unpair them.
Open the Apple Watch app on your iPhone.
Go to the My Watch tab and tap All Watches.
Tap the info button next to the watch you want to unpair.
Tap Unpair Apple Watch.
Tap Unpair [your Apple Watch name].
For GPS + Cellular models, choose whether to keep or remove your mobile data 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 may need to contact your network provider to cancel your mobile data subscription.
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How do I reset my Apple Watch
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