Flylinktech S19 Bluetooth Smart Wristband Watch Phone for IOS Android This Smart Watch Phone after insert a SIM card, can act as a smart phone itself. Or use its bluetooth function to sync your Android phone's calls/ call history/ phonebook/ SMS/ Email/ Music player/ Weather information ect. When a call, message or other notification comes in, your Smart Watch acts as an Android remote and gently vibrates on your wrist to let you know. Built-in SIM card dial and bluetooth dial(will add this function when smart bluetooth connected) Android System can support all function in the description;BUT IOS only make/answer telephone calls. Enjoy the S Voice personal assistant right on your wrist