| 摘要 |
Methods and devices for locating lost or stolen mobile devices allow users to remotely activate an alarm by receiving a secret number within a message directed to the mobile device, such as an SMS, MMS or e-mail message. Upon receiving a message containing a number, the mobile device determines whether the received number matches a secret number that is stored in secure memory. If the receive number matches the secret number in secure memory the mobile device activates an alarm mode. The alarm mode may include sounding an audible alarm to attract attention to the mobile device as well as other actions. The alarm mode may be deactivated by entering the secret number into the mobile device or by sending the secret number to the mobile device in a subsequent message.
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