A wireless communication device receives a message periodically broadcast by a wireless broadcast device placed within a location, and determines a type of the location and a broadcast period of the message. The wireless communication device sets a check period for periodically checking whether the wireless communication device receives the message, and checks if a present alert mode of the wireless communication device is suitable for the type of the location in a present check period. When the present alert mode of the wireless communication device is not suitable, the wireless communication device automatically switches the present tone mode to a new tone. When the wireless communication device does not receive the message within a next check period, the wireless communication device is determined as having left the location and automatically switched back to the present alert mode from the new alert mode.