Wireless communication devices

1. A wireless communications apparatus comprising:

a processing unit;

a first antenna;

a cellular receiver communicatively coupled to the processing unit and the first antenna to perform wireless communications via the first antenna using a first protocol;

a communication port configured to provide a control signal to a second device via a wired connection; and

a short-range wireless apparatus communicatively coupled to the second antenna and the processing unit and capable of identifying itself by performing wireless communications via the second antenna by modulating a radio frequency (RF) field using a second protocol, the second protocol being different than the first protocol;

wherein in accordance with the second protocol, the short-range wireless apparatus uses a random number as a part of a process by which it identifies itself.

2. The wireless communications apparatus of claim 1 , wherein the communication port comprises a serial port.

3. The wireless communications apparatus of claim 1 , further comprising a location system communicatively coupled to the processing unit, the location system being configured to provide data useful in determining a current location of the wireless communications apparatus using a global positioning system (GPS).

4. The wireless communications apparatus of claim 1 , wherein the short-range wireless apparatus is configured to communicate identifying information associated with the wireless communications device.

5. The wireless communications apparatus of claim 4 , wherein the short-range wireless apparatus communicates the identifying information upon receipt of a request from an interrogation device.

6. The wireless communications apparatus of claim 4 , wherein the short-range wireless apparatus is configured to communicate identifying information associated with the an account of a user of the wireless communications device.

7. A wireless communications device comprising:

a processing unit;

a first antenna;

a cellular receiver communicatively coupled to the processing unit and the first antenna to perform wireless communications via the first antenna using a first protocol;

a location system communicatively coupled to the processing unit, the location system being configured to provide data useful in determining a current location of the wireless communications device using a global positioning system (GPS); and

a short-range wireless apparatus communicatively coupled to the second antenna and the processing unit and capable of identifying itself by performing wireless communications via the second antenna by modulating a radio frequency (RF) field using a second protocol, the second protocol being different than the first protocol;

wherein in accordance with the second protocol, the short-range wireless apparatus uses a random number as a part of a process by which it identifies itself.

8. The wireless communications device of claim 7 , wherein:

the short-range wireless apparatus comprises a transmitter switchable between a first mode and a second mode;

in the first mode, the transmitter is configured to modulate an RF field energized by an interrogating device; and

in the second mode, the transmitter is configured to modulate an RF field energized by the transmitter using power from a battery of the wireless communications device.

9. The wireless communications device of claim 8 , further comprising a communication port configured to provide a control signal to a second device via a wired connection.

10. The wireless communications device of claim 7 , wherein the short-range wireless apparatus comprises an integrated circuit configured to store a unique identification number related to a user account with which the wireless communications device is associated.

11. The wireless communications device of claim 10 , wherein the short-range wireless apparatus is further configured to wirelessly provide the unique identification number to an interrogating device using the second protocol.

12. The wireless communications device of claim 7 , wherein the short-range wireless apparatus comprises:

a removable card, and

an integrated circuit embedded in the removable card, the integrated circuit configured to store a unique identification number associated with the wireless communications device.

13. The wireless communications device of claim 12 , wherein the unique identification number is unalterable.

14. The wireless communications device of claim 7 , wherein the short-range wireless apparatus is configured to communicate identifying information related to the wireless communications device.

15. A wireless communications device comprising:

a processing unit;

memory communicatively coupled to the processing unit;

a first antenna;

a cellular receiver communicatively coupled to the processing unit and the first antenna to perform wireless communications via the first antenna using a first protocol;

a second antenna; and

a short-range wireless communications apparatus communicatively coupled to the second antenna to perform wireless communications via the second antenna by modulating a radio frequency (RF) field using a second protocol, the second protocol being different than the first protocol;

wherein in accordance with the second protocol, the short-range wireless communications apparatus uses a random number as an identifier of the short-range wireless communications apparatus; and

wherein the short-range wireless communications apparatus is capable of communication in a first mode via backscattering radio frequency signals from a transmitting apparatus.

16. The wireless communications device of claim 15 , wherein the short-range wireless communications apparatus comprises a transmitter switchable between the first mode and a second mode;

wherein:

in the first mode, the transmitter is configured to modulate an RF field energized by the interrogating device; and

in the second mode, the transmitter is configured to modulate an RF field energized by the transmitter using power from a battery of the wireless communications device.

17. The wireless communications device of claim 16 , wherein:

in accordance with the second protocol, the short-range wireless communication apparatus generates a random number as the identifier of the short-range wireless communication apparatus; and

the interrogating device uses the random number as the identifier of the short-range wireless communication apparatus to select the short-range wireless communication apparatus for communications.

18. The wireless communications device of claim 17 , wherein the short-range wireless communication apparatus comprises:

a removable, card, and

an integrated circuit embedded in the removable, card, the integrated circuit configured to store the unique identification number.

19. The wireless communications device of claim 18 , wherein the removable card comprises a plastic card.

20. The wireless communications device of claim 15 , further comprising a wired link between the processor and the short-range wireless communications apparatus, the wired link configured to effect data communication between the processor and the short-range wireless communications apparatus.

21. The wireless communications device of claim 15 , wherein the processor is further configured to receive a signal via the communication port, the signal associated with data wirelessly received by the RF device.

22. The wireless communications device of claim 15 , further comprising a memory configured to store a unique identification number related to a user account with which the wireless communications apparatus is associated.

23. The wireless communications device of claim 22 , wherein the short-range wireless communication apparatus is further configured to wirelessly provide the unique identification number to the interrogating device using the second protocol.

24. The wireless communications device of claim 23 , further comprising a communication port communicatively coupled to the processing unit and configured to receive a signal via a wired connection, the signal associated with data wirelessly received by the identification device.

25. A method of performing wireless communications using a wireless communications apparatus, the apparatus comprising a first antenna, a memory, a processing unit, and a second antenna operably coupled to an identification device, the apparatus being configured to perform wireless communications via a cellular receiver coupled to the first antenna and the processing unit using a first protocol, the method comprising:

generating a random number;

performing wireless communications via the second antenna by backscattering a radio frequency (RF) field provided by a transmitting device using the second protocol, the second protocol being different than the first protocol; and

identifying the identification device in accordance with the second protocol;

wherein the identification device communicates the random number to the transmitting device as a part of the step of identifying.

26. The method of claim 25 , further comprising communicating a unique identifier associated with a user financial account.

27. The method of claim 26 , wherein the step of identifying is performed as a part of a financial transaction comprising debiting the financial account.

28. The method of claim 27 , wherein the financial transaction comprises a payment of a toll for use of a roadway.

29. The method of claim 25 , further comprising retrieving a unique identifier associated with a user financial account from the memory; and

communicating the unique identifier to the transmitting device;

wherein the step of communicating the unique identifier is performed as a part of a financial transaction.

30. A method of performing a financial transaction using a wireless communications apparatus, the apparatus comprising a first antenna, a memory, a processing unit, and a second antenna operably coupled to an identification device configured to operate in a first mode and second mode, the apparatus configured to perform wireless communications via a cellular receiver coupled to the first antenna and the processing unit using a first protocol, the method comprising:

generating a random number;

performing wireless communications via the second antenna by modulating a radio frequency (RF) field using a second protocol, the second protocol being different than the first protocol;

communicating identification information to an interrogating device in accordance with the second protocol, the identification information comprising the random number; and

performing a financial transaction based at least in part on the step of communicating the identification information;

wherein:

in the first mode, the identification device is configured to modulate an RF field energized by the interrogating device; and

in the second mode, the identification device is configured to modulate an RF field energized by the identification device using power from a battery of the wireless communications apparatus.

31. The method of claim 30 , wherein the performing a financial transaction comprises communicating a unique identifier associated with a user financial account.

32. The method of claim 30 , wherein, the financial transaction comprises a payment of a toll for use of a roadway.