COMPATIBILITY - Samsung?? HTC?? Sony?? LG?? HUAWEI?? ZTE?? OPPO?? XIAOMI(Attention for iphone 7?? iPhone 6?? iPhone 6 plus?? iPhone 5?? iPhone 5s ?? iPhone 4?? iPhone 4s?? this APP can' t be installed by iOS?? Our watch can only receive and make call after connect with iphone. Other functions are unavailable now for iphone!)</br>MAIN FUNCTIONS - It runs Facebook?? Twitter independently when you put SIM card and TF card in this watch. This"Pedometer?? alarm clock?? sleep monitor?? sedentary remind?? calendar?? calculator?? voice recorder?? MP3?? muti-timezone?? muti-language?? daylight saving time.</br>USE AS A INDEPENDENT PHONE - If put SIM card in the watch?? you can make phone call directly from the smart watch??including answering and dial-up. If not put SIM card?? you can connect watch with phone by bluetooth?? then you can make phone call?? including answering and dial-up.</br>SMART WATCH KIT CONTAINS - 1xGT08 Smart Watch?? 1xSurprising Gift?? 1x16GB KINGSTON SD Card?? 1xScreen Protector?? 3xSIM Card adaptor?? 1xpin?? 1xUser manual?? 1xUSB cable?? 1xElegant packing(ATTENTION: Brand XXX are the exclusive supplier for our XXX watch?? other sellers are illegal and unable to sell our watch. Don't be cheated!)</br>2 YEARS REPLACEMENT GUARANTEE- 24 hours online Customer Service??you are very welcome to contact us for any questions! 2 years free placement for following parts: battery?? USB line?? bracelet?? Metal watch buckle. CLICK "erful Life!</br></br>Product Description</br></br><b>We Promise You!</b><br>24 hours online Customer Service are ready for your any questions!</b><p><b>Smart Watch Review video:</b><br>https://www.youtube.com/watch?v=Kbrquiq7tmI<p><b>Bluetooth Connecting video:</b><br>https://www.youtube.com/watch?v=HOrt-68ynqM<br><b>Note:</b><br>1.If phone don't work with our APK?? you can download Mediatek SmartDevice<br>2.Plz charge watch half an hour before you use it<p><b>Feature</b><br>1.Compatible with android for full function(Bluetooth 3.0) and iphone(can receive call or make call)<b>But other functions are currently unavailable on iOS.</b><br>2.Call Function:<b>(GSM/GPRS850/900/1800/1900)2G/3G SIM card works on watc