Hey there, thanks for asking! This watch will be compatible with Samsung Smartphones, Non-Samsung Android Smartphones (Android OS 5.0 and above RAM 1.5GB and above), iOS 9.0 and above iPhone 5 and above. It will also be compatible with select Bluetooth-capable smartphones. Galaxy Watch-supported features may vary by carrier and compatible device. For a list of compatible smartphones and features, please visit https://www.samsung.com/galaxywatch/device-compatibility. For best results, connect with compatible Samsung Galaxy smartphones. ^Elizabeth