COMPATIBILITY - Samsung?? HTC"Sony" LG?? HUAWEI?? ZTE?? OPPO?? XIAOMI?? Lenovo and all other Android phones?? All functions work for Android phones. (Attention for iPhone?? the APP can' t be installed in iPhone?? Our watch can only receive and make call?? Pedometer?? Calendar?? Clock?? Music player?? Hands-free for IPhone?? other functions not work for IPhone.)</br>MAIN FUNCTIONS - It runs Facebook?? Twitter?? WhatsApp independently when you put SIM card and TF card in this watch. This watch Also have Pedometer?? alarm clock?? sleep monitor?? remote camera?? sedentary remind?? calendar?? voice recorder?? MP3?? muti-language.</br>USE AS A INDEPENDENT PHONE - If put a SIM card into the watch?? you can make phone call directly from the smart watch?? including answering and dial-up. If don't put SIM card?? you can connect watch with your phone by Bluetooth?? then you can make phone call?? including answering and dial-up by the watch too.</br>Capacitive full color display- Three stylish watch faces and an adjustable band perfectly paired with 1.54"ve Touch Screen 240*240 pixels</br>If you have any confusing problem of watch what you had received?? Before return or leave complains??