DZ09 smart watch latest card Bluetooth support Android Apple system, watch mobile phone Android smart mobile phone watch (Black) TWO WORKING MODE - Android Phone: If you install a GSM 2G/2.5G Network SIM Card into the smart watch, you can make phone call directly from the smart watch, including answering and dial-up etc.. Bluetooth Smart Watch: If not put SIM card, you can connect watch with phone by Bluetooth, then you can make phone call, including answering and dial-up, view and reply text messages and so on. SYNC FUNCTION - Just connect the smart watch with your phone via Bluetooth, then download and install the APP, so you can read Whatsapp, Twitter, Facebook and other application push messages, view and reply text messages, the time and date will be automatically synchronized. MULTIFUNCTION - Activity Tracker: Pedometer, sleep monitoring, sedentary remind. Other functions: Image viewer, Sound recorder (need put and SD card), Remote capture, Alarm clock, Calendar, Camera (0.3M), Two way Anti-lost. WIDE COMPATIBILITY - This smart watch can support most android and ios phones. Such as iPhone 8/8 plus/7/7 plus/6/6 plus/6s/6s plus/5/5s/SE (Only for Partial Functions), Samsung Galaxy Note8/s8/s8 plus/s7/Note 5, Google Pixel/Pixel XL, HTC, Sony, LG, HUAWEI, ZTE etc. smart phones. Android Smart phone with 4.1 is compatible for all features, but IOS may not sync