The W1 chip makes the AirPods and the new Beats headphones instantly pair with an iPhone. Does this work only with the iPhone 7 or would this work with all recent iPhone models as well?
i.e. Does the W1 need a specific client chip to work its pairing magic or would it work the same way with a recent Bluetooth (4?) chip in an iOS device?
(I know the AirPods also work with regular Bluetooth devices, but I'm particularly interested in the instant pairing feature)