Recently, frequent heavy rains and floods have caused disasters in many areas. To ensure smooth communication, China Mobile has provided users in Beijing, Tianjin, Hebei, and Jilin with a one-month free BeiDou SMS service (30 messages to send, unlimited receiving). The BeiDou SMS service features wide coverage, fast satellite acquisition, and high positioning accuracy. Users can send and receive emergency messages via BeiDou-enabled mobile phones when there is no network signal outdoors, allowing them to inform their families of their safety in critical situations. The activation method is as follows:
Send the SMS "KTBD" to 10086, and the service will be enabled after confirmation. In emergency scenarios where there is no mobile network coverage outdoors, users can use this service to send BeiDou SMS messages to transmit distress or safety information.