Sell, give away, or protect a lost Apple Watch
Before you sell or give away your Apple Watch, be sure to unpair it from your iPhone. This erases its contents, including payment cards, and removes Activation Lock (which prevents someone else from activating it). If you lose your Apple Watch, you can put it in lost mode.
Unpair Apple Watch and remove Activation Lock
Open the Apple Watch app on your iPhone.
Tap My Watch, then tap your Apple Watch at the top of the screen.
Tap , then tap Unpair Apple Watch.
Your Apple Watch is erased and removed from your iCloud account, and Activation Lock is removed. For more information, see the Apple Support article About Activation Lock on your Apple Watch.
Locate your Apple Watch
Open the Apple Watch app on your iPhone.
Tap My Watch, then tap your Apple Watch at the top of the screen.
Tap , then tap Find My Apple Watch.
In the Find My iPhone app on your iPhone, tap your watch to see its location on a map.
Put your Apple Watch in lost mode
Lost mode locks your device with a passcode so that others can’t access your personal information, and suspends the ability to pay with any credit or debit cards you have in Wallet for Apple Pay.
Open the Apple Watch app on your iPhone.
Tap My Watch, then tap your Apple Watch at the top of the screen.
Tap , then tap Find My Apple Watch.
In the Find My iPhone app on your iPhone, tap your watch, tap Actions, then tap Lost Mode.
Erase a lost Apple Watch
Before you erase your device, try to locate it or play a sound on it. After you erase it, you can’t use Find My iPhone to do either.
Open the Apple Watch app on your iPhone.
Tap My Watch, then tap your Apple Watch at the top of the screen.
Tap , then tap Find My Apple Watch.
In the Find My iPhone app on your iPhone, tap your watch, tap Actions, then tap Erase Watch.
Tip: For more help, open Find My iPhone, then tap Help in the top-left corner.
Remove payment cards using a web browser
If your Apple Watch is lost or stolen, you can sign in to appleid.apple.com using your Apple ID and remove your cards.
In the Devices area, choose the device.
Click Remove All under Apple Pay.
You can also call the issuers of your cards. For more information, see the Apple Support article If your Apple Watch is lost or stolen.
If your iPhone and Apple Watch are no longer connected, or if one of them isn’t functioning as expected, erase the contents of your Apple Watch first, and then unpair it using the Apple Watch app on your iPhone (if available).
For more information, see the Apple Support article What to do before you sell, give away, or trade in your Apple Watch, or buy one from someone else.