Question: will apple watch series 1 work with iphone 6s plus?
Answer: Apple Watch First Generation is compatible with the iPhone 5 or later, running iOS 8.2 or later. Apple Watch Series 1 and Series 2 are compatible with the iPhone 5 or later, running iOS 10 or later. ... If you buy a new version of either model, you'll need an iPhone 6s or later, running iOS 13 or later.