Mobile communication device, control method, and non-transitory storage medium

A communication method executed by a mobile communication device including a first communicator configured to perform short range wireless communication with a first communication device not via another device, a second communicator configured to perform wireless communication with the first communication device via another device, and an acceleration sensor configured to detect an acceleration, the communication method comprising,

• when it is determined that a travelling means of a user is changed from walking to a vehicle based on the acceleration detected by the acceleration sensor, causing the second communicator to notify the first communication device of an alarm when a notification condition is established, and causing the second communicator not to notify the first communication device of the alarm when the notification condition is not established, wherein
• the notification condition includes a condition that communication between the first communicator and the first communication device is disconnected.

A non-transitory storage medium that stores a control program for causing, when executed by a mobile communication device including a first communicator configured to perform short range wireless communication with a first communication device not via another device, a second communicator configured to perform wireless communication with the first communication device via another device, and an acceleration sensor configured to detect an acceleration, the mobile communication device to execute,

• when it is determined that a travelling means of a user is changed from walking to a vehicle based on the acceleration detected by the acceleration sensor, causing the second communicator to notify the first communication device of an alarm when a notification condition is established, and causing the second communicator not to notify the first communication device of the alarm when the notification condition is not established, wherein
• the notification condition includes a condition that communication between the first communicator and the first communication device is disconnected.