Read the instructions of Lang w5 watch.

More details can be found in official website, and only the main usage methods are introduced here.

Please insert the Nano-SIM card before use, and activate the newly purchased SIM card first. Please make sure that the data traffic service is enabled on the SIM card, otherwise the watch cannot be started, positioned, etc. Please make sure that the caller ID function is enabled on the SIM card, otherwise it will affect the normal use. If you change the card when the watch is turned on, please restart the watch after changing the card.

Don't use the watch when charging, please pay attention to remind children to avoid eating the watch by mistake. Mobile phones will interfere with the navigation system on the plane. Please cancel the watch's shutdown prohibition on the parent side, and then press and hold the watch power button to turn it off.