1. Judge whether the SIM card is open for Caller ID, if the SIM card is not open for Caller ID, it will not be able to identify the dialed number, so unfamiliar numbers can still call in. You need to contact the SIM card operator to confirm whether Caller ID is enabled;
2.Whether Xiaomi Kids app-My-Call whitelist is turned on, unfamiliar numbers can call the watch if it is not turned on; you need to wait a little while for whitelist to be turned on, and the relevant settings will take effect after synchronization with the watch.
2.Whether Xiaomi Kids app-My-Call whitelist is turned on, unfamiliar numbers can call the watch if it is not turned on; you need to wait a little while for whitelist to be turned on, and the relevant settings will take effect after synchronization with the watch.