Unpair watch w/o iPhone
I exchange my phone with newer model but forgot to unpair my watch. What can I do? I bought the watch from Apple and have all the paperwork
Apple Watch Series 4, watchOS 7
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On a computer, go to iCloud.com and sign in with your Apple ID.
Go to Find Iphone.
Select All Devices, then click your Apple Watch.
Click Erase Apple Watch.
Select Next until the device is erased.
Click the remove button next to your Apple Watch.