Smart Watch Phone Functions】Our Kids smart watch Q90 Series： Phone Watch with SIM Card Slot, GPS Safety Tracking, Phone Book, Health, Safe Area,Anti-Lost Alarm,Two-way Calls, Low-power, Alarm, Remote shutdowm, Find SmartWatch,SOS Emergency Call.Different versions of the application（SeTracker or SeTracker2）, there will be different functions. 【CALL & TEXT MESSAGE COMMUNICATION】Insert a 2G GSM SIM card to communicate with your child by sending calls， text messages or voice messages.(Please call the sim card's provider to verify if the sim supports GSM network and has 2g digital service or not before purchasing.) In US we’d like to Recommend the SPEEDTALK MOBILE. Please purchase SpeedTalk sim with "mobilenet" apn not with "wholesale" apn. 【LOCATION TRACKER - with GPS&LBS&WiFi】kids smart watch, three mode positioning means Three safety for children. Enables you to stay connected, whether your child is inside or outside a building. The watch can track and locate your child’s position by GPS, LBS, BDS, GPRS, WiFi【 Watch Finder】- If you have lost the watch at home, Click on Watch finder button on the app and watch will ring the bell 【SOS EMERGENCY CALL】Kids can press the SOS key for 3 seconds to circularly call families' numbers for help. The geofencing feature alerts you when your child moves outside of the designated area. More features-- Watch Remove/Anti-lost/Low Power Alert, Touch-touch Making Friends, Prohibition of Use During the Class, Warm Heart Award. Please look for the smart watch sold by the Themoemoe brand,