Using this Cactus Kidocall 4G smart phone watch is easy. First, insert a Nano SIM card into the watch to get it connected. You can make voice and video calls just like on a regular phone. To use the GPS tracking, turn on the location function in the settings. If you're in an emergency, press the SOS button to send out a distress signal. The high - definition camera can be used to take photos, and you can view them in the album. Set up the geo - fence area in the app so you'll get an alert if the watch leaves that area. The call firewall allows you to block unwanted calls. For health tracking, the pedometer counts your steps throughout the day. You can set alarms for important events and use the stopwatch for timing activities. When you're at school, activate the school mode to limit distractions. This watch is IP67 waterproof, but it's best not to keep it submerged for a long time. Charge the 850mAh lithium - ion battery regularly using the provided charger. Avoid exposing the watch to extreme temperatures or strong impacts to keep it in good condition.