Flylinktech New L15 Hi Watch Bluetooth Smart Watch Phone Suppot SIM Card Unlocked 1.55 Inch Touch Screen for Smartphones IOS Apple iPhone 5S,5,4S,4 Android Samsung S5,S4,S3,S2,Note 3,Note 2(IOS System Can Use Partial Function) 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. Built-in SIM card dial and bluetooth dial(will add this function when smart bluetooth connected) It is also a standby cell phone, when your smart phone without power, you can put the SIM card into the watch, it can make calls, send and receive SMS when meet the emergency. Support for background,support equalizer, hands-free speaker Android System can support all function in the description;BUT IOS only make/answer telephone calls.