Desktop cellular phone having SIM card-related security features

A method for securing a cellular phone having a processor, and a SIM card with a SIM card processor inserted in the phone, comprising the steps of:

• turning on the phone;
• sending first data from the phone processor to the SIM card processor;
• generating second data, via the SIM card processor, using a first algorithm and the first data;
• sending the second data from the SIM card processor to the phone processor;
• generating third data, via the phone processor, using a second algorithm and the first data;
• comparing, via the phone processor, the second data to the third data;
• determining, via the phone processor, whether a relationship between the second data and the third data satisfies a predefined requirement;
• and
• preventing, at least in part, operation of the phone, if the relationship between the second data and the third data does not satisfy the predefined requirement.

A cellular phone having a SIM card inserted therein, comprising:

• means for sending first data from the phone to the SIM card;
• means for generating second data, using at least the first data;
• means for sending the second data from the SIM card to the phone;
• means for generating third data, using at least the first data;
• means for comparing the second data to the third data;
• means for determining whether a relationship between the second data and the third data satisfies a first predefined requirement;
• and
• means for preventing, at least in part, operation of the phone, if the relationship between the second data and the third data does not satisfy the first predefined requirement.

A cellular phone having a SIM card inserted therein, comprising:

• means for sending first data from the SIM card to the phone;
• means for generating second data, using at least the first data;
• means for sending the second data from the phone to the SIM card;
• means for generating third data, using at least the first data;
• means for comparing the second data to the third data;
• means for determining whether a relationship between the first data and the second data satisfies a predefined requirement;
• and
• means for preventing, at least in part, operation of the phone, if the relationship between the first data and the second data does not satisfy the predefined requirement.

A method for securing a specified cellular phone, wherein the specified cellular phone is authorized for use only with an approved SIM card, and the approved SIM card is authorized for use only with the specified cellular phone, comprising the steps of:

• turning on a phone with a SIM card inserted therein;
• determining, via a SIM card processor in the inserted SIM card, whether the phone is the specified cellular phone;
• determining, via a processor in the phone, whether the inserted SIM card is the approved SIM card;
• and
• preventing, at least in part, operation of the phone, if the phone is not the specified cellular phone, or if the inserted SIM card is not the approved SIM card.