GOLDSTAR Bluetooth 3.0 Smartwatch 1.56 Inch Touch Screen Support SIM Card & TF Men Women Smart Phone Watch with Pedometer Camera for Sony/Samsung All Android Smartphones (Silver) The GOLDSTAR Smart Watch: Support Single Micro SIM Card, Frequency: GSM 850/900/1800/1900 MHz, Hands-free, Phone records, Phone book, NOTE: the app to sync is called BT Notifications BT Dialer, Call Reminder, BT Call; BT SMS/IM Message Notified, Phone function: Make phone call directly from the smart watch, include answering and dial-up. Support make calls by smart watch 1.56" TFT LCD Touch Screen, 240*240 pixels, Camera Anti-loss Technology to bind phone; Pedometer, Sleep Monitor, Sedentary Reminder; Calendar (Synchronizable) This watch can also work with iPhone as a BT device(Means you can receive a call or make a call also sync your contacts to this watch via BT).But Some functions like Notification Push, Remote capture, Anti-lost are currently unavailable on iOS because the iOS app is unavailable now