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This item is Bluetooth Model & International Version. (**IT DOES NOT SUPPORT 2G, 3G, 4G LTE MOBILE NETWORKS**) It comes with a European plug, but any standard micro 5 pin USB cable (Android phone charging cable) works. Compatible with Android 4. 4 (KitKat) and later with 1. 5GB RAM. Some features may not be available. For best compatibility, connect with Samsung Galaxy phones. (It does NOT support Samsung Tablet & iOS) The Gear S3 has a built-in speaker that lets you make or take calls right away without ever having to remove your phone from your pocket. (*Bluetooth model requires Wi-Fi connection and a voice call app for phone-free calls. )