| 摘要 |
Embodiments of the invention disclose a mobile device, such as a mobile phone, that is capable of causing an alarm to be played to a user, to prevent a loss thereof. Advantageously, the mobile device also moves to a locked state in anticipation of being lost, thereby to prevent unauthorized use thereof. In a further embodiment, an accessory device is provided. The accessory device can be secured to an article of value that does not natively have radio capability. The accessory device is able to send a control signal to a tag carried on a person of a user, which control signal causes the tag to sound an alarm to notify the user of a potential loss of the article of value.
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