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I have the first Ultra and just looked back at the data and they were never interrupted. It isn't included in the release either. Wonder what is different about it. Did apple arrive at a separate agreement for that device?

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If you have a watch that was imported into the US before the restriction went into effect, you never lost the (original, watch-only) Blood Oxygen functionality and this update doesn't affect you.

Up to mid-2024, Costco was selling 2 separate SKUs of Apple Watch Ultra 2: watches with the blood oxygen feature and watches imported after the cutoff which were missing the feature.

A limitation of this workaround is that it only works on recent watches. If you are in the unfortunate position of getting a Series 6, 7, 8 watch replaced by Apple, they'll give you a replacement with the feature missing, and this update doesn't "fix" it..

There was an import ban on Apple Watches that had the feature, and the import ban was lifted by disabling the feature on imported watches.

There wasn't a requirement that it be disabled on watches that had already been imported, or on watches that weren't being imported to the US.

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