Compatibility: All Android and iOS Mobile Phone & Android Tablet PC. Android Mobile Phone: Samsung?? HTC?? Sony?? LG?? HUAWEI?? ZTE?? OPPO?? XIAOMI</br>Your private health builder?? help you to monitor the daily movement?? constantly monitor movement distance. Speed. Steps."nsumption?? etc; Daily check your sleep quality.</br>As long as gently touching the clock picture?? can transform a variety of styles?? dial shows the time</br>Anti lost remind??Two way search: When smartphones leave more than 5 meters?? watch will ring or vibrate to remind you</br>Built in 8GB memory. Bluetooth Function: Phone calls sync?? SMS sync?? NFC?? Phone contacts sync?? Intelligent anti-lost?? Remote camera</br></br>Product Description</br></br><b>Note:</b> <br> <br> This watch is Bluetooth 3.0. All functions support android 4.3 and up smart phones. <br> But for iphone?? it just support answer & call?? phone book?? music play?? camera?? clock?? pedometer?? phone anti-lost alert. Still not support SMS?? Radio?? remote camera control?? sleep monitoring?? etc. <br> Pls Make Sure your SIM card is Post-paid SIM card?? and it Support 2G Net