Cannot update watch because phone won’t update
I cannot update my watch until I update my phone. However, my phone won’t update to iOS 17. How can I update my watch?
Apple Watch Series 6, watchOS 9
Question marked as
watchOS 10 requires an iPhone that has iOS 17 installed, and you can only pair an Apple Watch running watchOS 10 with an iPhone having iOS 17 already installed.
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copied from: Set up and pair your Apple Watch with iPhone - Apple Support