I would like to buy a refurbished series 7 to go with my iPhone SE (2016) which can`t go further than iOS 15.7. Series 7 was WatchOS8 which is fine with iOS 15. But what would happen if the watch has been already updated to WatchOS9? Will it be set back for tethering to the iPHone or is there a danger that it can`t be tethered?
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