iOS 13
Trying to pair apple wstch series 4 to my iPhone 6
iPhone 6, iOS 12
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Trying to pair apple wstch series 4 to my iPhone 6
iPhone 6, iOS 12
If your Apple Watch Series 4 was upgrade to watchOS 6, then you cannot pair it with your iPhone 6, as watchOS 6 requires iOS 13 and the iPhone 6 will not upgrade to iOS 13.
If you just purchased the Apple Watch, see if you can return it (if you just got it, I'm assuming it was a used model).
If this is your own Apple Watch that you managed to get upgraded to watchOS 6, then your options are
If your Apple Watch Series 4 was upgrade to watchOS 6, then you cannot pair it with your iPhone 6, as watchOS 6 requires iOS 13 and the iPhone 6 will not upgrade to iOS 13.
If you just purchased the Apple Watch, see if you can return it (if you just got it, I'm assuming it was a used model).
If this is your own Apple Watch that you managed to get upgraded to watchOS 6, then your options are
iOS 13