Hello friends,

I am planning on buying an iPhone 15 Pro. I currently have an iPhone X.

I have a Watch Series 4.

Note that iPhone X doesn’t get iOS 17, and is stuck on 16. Whereas, the Watch Series 4 does get the new WatchOS 10.

Here’s my concern – if the Watch will need to be updated to WatchOS 10, to work with the iPhone 15 Pro which will obviously be on iOS 17 – then, if I were to return the iPhone 15 Pro, and go back to using my iPhone X, I would be unable to downgrade the watchOS (since you can’t do this anyways), therefore, buying the iPhone 15 Pro and updating my Watch Series 4 to WatchOS 10 would effectively lock me in, leaving me unable to return the phone and still use my watch.

I am hoping my Series 4 will pair with the iPhone 15 Pro without needing the new WatchOS, but I am not sure.

(Or, alternatively, if the Series 4 could be updated to WatchOS 10 *and still work with an iPhone that is on iOS 16).

Does anyone know if Apple has a list of what OS’s specifically support pairing with each other?

  • LaketechBEnglish
    1·
    1 year ago

    Yes, once you update your watch (if you choose to do so), there is no going back to using it with the iPhone X Or any iPhone not running iOS 17.

    I do believe though that you can pair a WatchOS9 watch to any iPhone running iOS 17 without having to upgrade the watch. I did this for about a month with an old Series 3 watch that I had until I sold it.