Abstract:
A method and apparatus is provided for controlling a mobile phone when it has been lost or stolen in order to prevent its use except to help the owner find it. Controlling the phone remotely may be implemented via a known Short Messaging System, for example. The security features provided are as follows: (1) Displaying contact information (phone number) of the owner on screen when the mobile phone can not start up normally, for example, due to an incorrect security code entry; (2) Setting the mobile phone in a secure state where it can only be used to call one number (Emergency calls are of course always possible.); and (3) Commanding the mobile phone to send information about its location and usage via SMS to a given number.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of Invention 
     The present invention relates to a mobile phone; and more particularly, to the security and control of a mobile phone that is lost, stolen, or misused. 
     2. Description of Related Art 
     Various security mechanisms for mobile phones exist: 
     A SIM card having a PIN code is known in the art. If a code query is active the SIM card cannot be used for calling. 
     Mobile phones also have security code features which prevent the use of the mobile phone, or restrict it (e.g. preventing the use of a phone number memory). When the feature is active, a code is asked at startup. 
     Another security measure is to use a keypad lock that can require a security code when opened. It is also possible to turn the keypad lock on automatically, for example, after a timeout when the mobile phone is not used. 
     However, the known anti-theft features do have disadvantages: 
     For example, if a phone has been lost with the power on, anyone can use it as long as it remains on. Only automatic locking when the mobile phone is not used prevents this. 
     Some security schemes load the user during daily use. When the user has to type in a security code each time the mobile phone powers on, or even each time when the keypad lock is opened, it can be seen as unnecessary work most of the time. The cases where a mobile phone gets lost are quite rare, after all. 
     There is no easy way for the person who has found a lost phone to contact the owner, especially if the mobile phone has some kind of lock preventing the use of it. 
     SUMMARY OF INVENTION 
     In summary, the present invention provides a method and apparatus for controlling a mobile electronics device, including a mobile phone or laptop computer, when it has been lost, stolen or misused in order to prevent its use except to help the owner find it. Controlling the mobile phone remotely may be achieved, for example, via a Short Messaging System (SMS). The security features are as follows: 
     1) Displaying contact information (phone number) of the owner on a display screen when the mobile phone does not start up normally, for example, due to an incorrect security code entry. 
     2) Setting the mobile phone in a secure mode where it can only be used to call one number. (Emergency calls are of course always possible.) 
     3) Commanding the mobile phone to send information about its location and usage via SMS to a given number. 
     In order to prevent unauthorized persons from misusing others&#39; mobile phones, commands given remotely must contain a security code for the mobile phone. The security code is also needed to open a locked phone. 
     When the mobile phone can be set into a secure mode by remote control after it has actually been lost, some of the above-mentioned problems can be solved: 
     The mobile phone can be set into a locked mode by remote control, when it is still on. 
     The security code is not needed in daily use. (However, the PIN code query in the SIM card would still be needed in order to prevent the use of the SIM card in other phones.) 
     The mobile phone can be used to inform the owner about its location. 
     The method and apparatus of the present invention also complement and enhance the other security mechanisms already in use. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     The drawing includes the following: 
     FIG. 1 is a block diagram of a mobile phone that is the subject matter of the present invention. 
     FIG. 2 is a block diagram of security and control modules of the mobile phone shown in FIG.  1 . 
     FIG. 3 is a phone locked display message for displaying on the mobile phone shown in FIG.  1 . 
     FIG. 4 is a phone locked display message for displaying on the mobile phone shown in FIG.  1 . 
     FIG. 5 is a phone lost display message for displaying on the mobile phone shown in FIG.  1 . 
     FIG. 6 is a phone stolen display message for displaying on the mobile phone shown in FIG.  1 . 
    
    
     DETAILED DESCRIPTION OF INVENTION 
     FIG. 1 shows the mobile phone generally indicated as  10  that is the subject matter of the patent application, for use in connection with a telecommunication network  11 . The scope of the invention is also intended to cover other mobile electronic devices, such as a portable computer. 
     The mobile phone  10  includes a signal processor  12  connected to an antenna module  14  having an antenna  15 , a display module  16 , a position location module  18 , a microphone/earpiece module  20 , a read only memory  22 , a keyboard module  24  and a random access memory  26 , which are all known in the art. The operation of the signal processor  12  in relation to the aforementioned elements is also known in the art. Moreover, the scope of the invention is not intended to be limited to any particular kind or type of these elements. 
     The signal processor  12  is also connected to security and control modules  28 . The whole thrust of the invention relates to the operation of the security and control modules  28  with respect to the security and control of the mobile phone  10 , especially by remote control. 
     FIG. 2 shows in detail the security and control modules  28 , which will be described in relation to the various security and control applications set forth below. 
     SECURITY APPLICATIONS 
     The security and control modules  28  include an owner information display module  52 , a remote-controlled secure mode module  54  and a status message module  56  which are discussed below. 
     Owner Information Display 
     In FIG. 2, the owner information display module  52  operates to enhance current security concepts by providing contact information of the owner of the mobile phone  10  (FIG. 1) for cases where the mobile phone  10  is found by someone else. 
     The random access memory  26  (FIG. 1) in the mobile phone  10  contains fields where the owner/user can store information (above all, a phone number other than the mobile number) about him/herself. The owner information is used to improve the existing security code concept as follows: 
     When the mobile phone  10  starts up, the SIM is checked first, and a PIN code query is displayed (if PIN query is “on”) . In case the PIN is successfully entered and the SIM is an owner&#39;s SIM (known by the mobile phone), the mobile phone starts up and can be used normally. 
     The improvement of the present invention is that: if the PIN query is cancelled, the owner display module  52  displays on the display module  16  (FIG. 1) of the mobile phone  10  a phone locked message with owner information shown in FIG.  3 . 
     In an alternative case, another SIM card which is not the owner&#39;s SIM may be put into the mobile phone  10 , and if the PIN is entered correctly, then the mobile phone  10  requests a security code. If the security code is given correctly, everything proceeds as usual. But if the security code query is cancelled, or a wrong security code is given, the mobile phone  10  goes into a secure mode where the owner display module  52  displays on the display module  16  (FIG. 1) the information shown in FIG.  4 . 
     In this case, the SIM has been successfully inserted in the mobile phone, so it is possible to make a call. However, the owner display module  52  of the mobile phone  10  only allows a call to the number displayed in the message. The call can be made easily via the softkey on the keyboard module  24 . 
     The owner display module  52  disables any other use of the mobile phone  10  (except for emergency calls). This is called a Secure mode, which is discussed in more detail below. 
     The owner information display module  52  may be implemented using hardware, software or a combination thereof. A person skilled in the art would be able to implement the owner information display module  52  without undue experimentation. 
     Remote-controlled Secure Mode 
     In FIG. 2, the remote-controlled secure mode module  54  places the mobile phone  10  in a secure mode, which is a state where the usage of the mobile phone  10  is prohibited, except for emergency calls and calls to one other number. 
     The mobile phone  10  can go into the secure mode at startup, as described above in relation to the owner information display module section, or it can be switched into the secure mode by remote control, using a control message, while the mobile phone  10  is “on”. The security code of the mobile phone  10  is always required in the control message to make it valid. (Below, in a section entitled Control Messages, the structure of control messages is discussed in more detail.) 
     For different situations the user can provide different control messages, and display different messages in these modes depending on whether the mobile phone  10  is purposely locked for any reason. The mobile phone is typically locked because it is lost or stolen, as follows: 
     Lock Phone 
     The remote-controlled secure mode module  54  locks the mobile phone  10  when the owner sends the control message with a lock phone instruction. The mobile phone  10  goes into a phone locked state or mode, and a phone locked display message shown in FIG. 4 is displayed by the display module  16  in FIG.  1 . The owner number stored in memory  26  of the mobile phone is used in the phone locked display. 
     Phone Lost 
     The remote-controlled secure mode module  54  locks the mobile phone  10  when the owner sends the control message with a phone lost instruction. The remote-controlled secure mode module  54  locks the mobile phone and displays a phone lost display message shown in FIG. 5 on the display module  16  in FIG.  1 . In this case, the mobile phone number to be displayed can be sent with the control message, so it can be any number the owner finds convenient at the moment. If a number is not sent, the number stored in the memory  26  of the mobile phone is used instead. If the mobile phone is switched off and after being put into a phone lost mode, the mobile phone starts up as described in the previous section, but if the (PIN and) security code is not entered correctly, the new contact number will be displayed instead of the previously stored one in the message, and phone lost text is used instead of the phone locked text. 
     Phone Stolen 
     The remote-controlled secure mode module  54  also locks the mobile phone  10  when the owner sends the control message with a phone stolen instruction. The remote-controlled secure mode module  54  will lock the mobile phone  10  and display a phone stolen display message shown in FIG. 6 on the display module  16  in FIG.  1 . This phone state is identical with that of the phone lost message. 
     An example of a control language for implementing these instructions from the user/owner to the mobile phone  10  are discussed in more detail below. 
     The remote-controlled secure mode module  54  may be implemented using hardware, software or a combination thereof. A person skilled in the art would be able to implement the remote-controlled secure mode module  54  without undue experimentation. 
     Remote PIN Code 
     If the mobile phone  10  is lost, stolen or misplaced the user may also send via a telecommunication signal a remote PIN code command to his/her mobile phone  10  if the need for a PIN code has not already been activated by the user. The remote-controlled secure mode module  54  will performs functions to activate the need for a user to provide a PIN code in order to use the mobile phone  10 . 
     Status Message 
     In FIG. 2, the status message module  56  allows the user to request information about the mobile phone&#39;s status by sending it the control message with such a request. The mobile phone  10  would return information, for example, via a Short Message System (SMS), to a number specified in the control message. The information could contain, for example, phone location data or last usage data. 
     The status message module  56  may be implemented using hardware, software or a combination thereof. A person skilled in the art would be able to implement the status message module  56  without undue experimentation. 
     Location Data 
     In order to send location data, the status message module  56  cooperates with the position location module  18  to send location data indicating the location of the mobile phone  10 . The position location module  18  would cooperate with, for example, a global positioning satellite system (not shown), to provide some kind of location information to determine the geographical position of the mobile phone. 
     Last Usage Data 
     The status message module  56  may also send last usage data, such as when the mobile phone was used the last time (call, SMS, or maybe just the use of an application). This information is typically stored in the memory of the mobile phone  10 . 
     This is useful in situations where the mobile phone is being tracked, for example, if the user does not remember where he/she left it. The second item tells whether someone has been using it. 
     Control Messages 
     In FIG. 2, the security and control module  28  has control message modules  50  that include a transfer of control messages module  62  and a control language module  64 . 
     Transfer of Control Messages 
     In FIG. 2, the transfer of control messages module  62  controls the transfer of control messages between the user to the mobile phone  10  (FIG.  1 ). 
     The scope of the invention is not intended to be limited to any particular way of transferring the control message to the mobile phone  10 . However, whatever system is used for transferring the control message to the mobile phone  10 , the system must enable the average user to easily send the control message. This means that the user must have an easy access to the system which is used to send the message, and the operation for composing and sending the message must also be easy. 
     The Short Message System (SMS), which is known in the art, provides a natural choice or scheme for transferring control messages, but other message transferring systems are known in the art, including wireless internet connections. 
     Characteristics of an SMS interface include the following: 
     Any mobile phone with SMS capability can be used to send the control message. 
     The receiving mobile phone can receive the control message automatically whenever it is “on” and in contact with a network. 
     The transfer of control messages module  62  may be implemented using hardware, software or a combination thereof. A person skilled in the art would be able to implement the transfer of control messages module  62  without undue experimentation. 
     Control Language 
     In FIG. 2, the control language module  64  operates to control the language used to transfer messages between the user to the mobile phone  10  (FIG.  1 ). The control language is implemented for composing control messages. The control language is a simple one and resembles a natural language in order to make it easy to memorize. 
     The following is an example of a simple control language that may be used: 
     Commands and parameters are separated by nonprinting characters (space, new line etc.). 
     A command starts with the keyword SECURITY followed by the security code of the mobile phone. When a short message arrives, the control language module  64  always checks the beginning of the control message, and if a keyword with matching security code is found, it interprets the whole message and acts accordingly. 
     After the beginning keyword and security code, one command keyword (and its parameter if required) can be added. Examples of supported commands and a description thereof are listed in Table 1 as follows: 
     
       
         
               
               
               
               
             
           
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 Keyword 
                 Parameter 
                      Description 
               
               
                   
                   
               
             
             
               
                   
                 LOCK 
                 — 
                 Locks the mobile phone, 
               
               
                   
                   
                   
                 displays “Phone is locked” 
               
               
                   
                   
                   
                 message and a predefined 
               
               
                   
                   
                   
                 phone number on screen. 
               
               
                   
                   
                   
                 Allows calls to the number. 
               
               
                   
                 LOST 
                 phone number 
                 Locks the mobile phone, 
               
               
                   
                   
                   
                 (optional) displays a “This 
               
               
                   
                   
                   
                 phone is lost” message on 
               
               
                   
                   
                   
                 screen. Allows calling one 
               
               
                   
                   
                   
                 number, specified by the 
               
               
                   
                   
                   
                 mobile phone number 
               
               
                   
                   
                   
                 parameter, or the 
               
               
                   
                   
                   
                 predefined one. 
               
               
                   
                 STOLEN 
                 phone number 
                 Locks the mobile phone, 
               
               
                   
                   
                 (optional) 
                 displays a “This phone is 
               
               
                   
                   
                   
                 stolen” message on screen. 
               
               
                   
                   
                   
                 Allows calling one number, 
               
               
                   
                   
                   
                 specified by the mobile 
               
               
                   
                   
                   
                 phone number parameter, or 
               
               
                   
                   
                   
                 the predefined one. 
               
               
                   
                 UNLOCK 
                 — 
                 Unlocks the mobile phone so 
               
               
                   
                   
                   
                 that it can be used 
               
               
                   
                   
                   
                 normally. 
               
               
                   
                 INFO 
                 phone number 
                 Commands the mobile phone 
               
               
                   
                   
                   
                 to send a status message to 
               
               
                   
                   
                   
                 the number specified in the 
               
               
                   
                   
                   
                 mobile phone number 
               
               
                   
                   
                   
                 parameter. 
               
               
                   
                   
               
             
          
         
       
     
     As an example, a command message containing the text “SECURITY 12345 LOST 02654321” would instruct the control language module  64  to display the lost phone message, to lock the mobile phone, and to allow calls to the phone number 02654321. 
     The control language module  64  may be implemented using hardware, software or a combination thereof. A person skilled in the art would be able to implement the control language module  64  without undue experimentation. 
     In one embodiment, the control messages would only be effective when the mobile phone  10  (FIG. 1) uses the owner&#39;s SIM. Therefore, other existing security mechanisms would be needed to achieve the best security. 
     The present invention improves current security schemes, for example, in the usual case when a mobile phone is lost when it is “on”, so that anyone can use it until power runs out or the operator blocks it. The present invention can also help in those cases where the PIN query is off, although the SIM can then be used in other phones. 
     Scope of the Invention 
     Accordingly, the invention comprises the features of construction, combination of elements, and arrangement of parts which will be exemplified in the construction hereinafter set forth. 
     It will thus be seen that the objects set forth above, and those made apparent from the preceding description, are efficiently attained and, since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.