1、Make/receive calls (BT and local), send/receive messages (BT and local), synchronize phone book, two-way anti-lost reminder, camera, remote camera, pedometer, sleep monitoring, sedentary reminder, alarm clock, calendar, calculation player, voice recorder, image viewer, music player (BT and local), Facebook, Twitter, WhatsApp and browser login (requires SIM card and memory card).2、Apps for Android phones are called smartwatches. Scan the QR code on the watch to get the APP in Chinese. So search the app from Google store.3、Since there is no APP available for iPhone, some functions cannot be used (anti-lost, message synchronization, app message notification, remote photography, Bluetooth music). Other functions can be used normally without APP.4、You need to insert a valid Micro SIM card and Micro SD card into the smartwatch to use apps like the browser, Facebook, Twitter, and WhatsApp.5、The watch has no built-in memory, so an SD card is required to save pictures and music. The smart watch is only waterproof for daily life, please do not wear it while swimming, diving or showering.