Patent ID: 7890083

Claim:
A method of tracking a lost mobile device connected to a wireless or wired network comprising: storing user identity information included in a user identity card inserted into the mobile device, a warning message, and information regarding a destination of the warning message; and when a new user identity card is inserted into the mobile device, comparing user identity information stored in the new user identity card with the stored user identity information and automatically transmitting the warning message to the destination of the warning message if the user identity information stored in the new user identity card is not identical to the stored user identity information, wherein if an outgoing call/SMS barring option is set in the mobile device, checking changes in a status of the outgoing call/SMS barring option at regular intervals, and transmitting the warning message to the destination of the warning message when detecting the status of the outgoing call/SMS barring option as canceled, wherein after inputting a password, the warning message, and the destination of the warning message, a tracking module which performs tracking of the lost mobile device, is activated, and wherein the password is required when accessing or editing the password, when accessing or editing contents of the warning message, and when accessing or editing the destination of the warning message, wherein the contents of the warning message includes current location of the user, Mobile Station International Subscriber Directory Number (MSISDN)/International Mobile Subscriber Identities (IMSI), and text input by said user.