Listen mode for wireless devices

1. A method for listening on a cell of a wireless network comprising:

determining one or more available cells for a wireless device;

determining one or more available networks based at least in part on the one or more available cells;

selecting a network based at least in part on one or more network selection criteria;

selecting a cell of the selected network;

listening, using a listen mode, on the selected cell, wherein listening enables receiving a control channel information from the cell of the selected network without registering and without being in a standby mode with the selected network, wherein the wireless device is anonymous to the selected network in the listen mode; and

in the event that a registration condition is satisfied, registering the wireless device on the selected network using the control channel information.

2. A method as in claim 1 , wherein the registration condition comprises having to send data from the wireless device.

3. A method as in claim 1 , wherein the registration condition comprises having not registered for a predetermined period of time.

4. A method as in claim 1 , wherein the registration condition comprises one or more user actions.

5. A method as in claim 1 , wherein the wireless network comprises a cell phone network.

6. A method as in claim 1 , wherein the wireless network comprises a WiFi network.

7. A method as in claim 1 , wherein the wireless network comprises a WiMax network.

8. A method as in claim 1 , wherein the wireless network comprises a CDMA network.

9. A method as in claim 1 , wherein the wireless network comprises a GSM network.

10. A method as in claim 1 , wherein the wireless network comprises a GPRS network.

11. A method as in claim 1 , wherein the wireless network comprises a TDMA network.

12. A method as in claim 1 , further comprising storing information determined from available cells for the wireless device.

13. A method as in claim 12 , wherein the stored information comprises signal strength from available cells.

14. A method as in claim 12 , wherein the stored information comprises signal strength from one or more of the available cells and location information.

15. A method as in claim 14 , wherein such location information is derived from GPS location.

16. A method as in claim 12 , wherein stored information is used to provide approximate location information for other devices.

17. A method as in claim 12 , wherein the stored information comprises cell identifiers.

18. A method as in claim 12 , wherein the stored information comprises neighboring cell identifiers.

19. A method as in claim 12 , wherein the stored information comprises network identifiers.

20. A method as in claim 12 , wherein the stored information comprises location area identifiers.

21. A method as in claim 1 , further comprising in the event that information determined from available cells for the wireless device meets one or more triggering criteria, performing a predetermined operation.

22. A method as in claim 21 , wherein one of the one or more triggering criteria comprise that the determined information from available cells indicates that the wireless device is located in a predetermined prohibited geographic area.

23. A method as in claim 21 , wherein one of the one or more triggering criteria comprises that the determined information from available cells indicates that a time is after a predetermined time.

24. A method as in claim 1 , wherein listening comprises a period of time that the selected network is unaware of the wireless device.

25. A system for listening on a cell of a wireless network comprising:

a processor; and

a memory coupled with the processor, wherein the memory is configured to provide the processor with instructions which when executed cause the processor to:

determine one or more available cells for a wireless device;

determine one or more available networks based on the one or more available cells;

select a network based on one or more network selection criteria;

select a cell of the selected network;

listen, using a listen mode, on the selected cell, wherein listening enables receiving a control channel information from the cell of the selected network without registering and without being in a standby mode with the selected network, wherein the wireless device is anonymous to the selected network in the listen mode; and

in the event that a registration condition is satisfied, register the wireless device on the selected network using the control channel information.

26. A computer program product for listening on a cell of a wireless network, the computer program product being embodied in a computer readable storage medium and comprising computer instructions, which when executed by a computer cause the computer to:

determine one or more available cells for a wireless device;

determine one or more available networks based on the one or more available cells;

select a network based on one or more network selection criteria;

select a cell of the selected network;

listening, using a listen mode, on the selected cell, wherein listening enables receiving a control channel information from the cell of the selected network without registering and without being in a standby mode with the selected network, wherein the wireless device is anonymous to the selected network in the listen mode; and

in the event that a registration condition is satisfied, registering the wireless device on the selected network using the control channel information.

27. A method for listening on a cell of a wireless network comprising:

determining one or more available cells for a wireless device;

determining one or more available networks based at least in part on the one or more available cells;

selecting a network based at least in part on one or more network selection criteria;

selecting a cell of the selected network;

listening, using a listen mode, on the selected cell, wherein listening enables receiving control channel information from the cell of the selected network without registering and without being in a standby mode with the selected network, wherein the wireless device is anonymous to the selected network in the listen mode;

storing control channel information; and

refreshing stored control channel information from the cell of the selected network.

28. A method for listening on a cell of a wireless network comprising:

determining one or more available cells for a wireless device;

determining one or more available networks based at least in part on the one or more available cells;

selecting a network based at least in part on one or more network selection criteria;

selecting a cell of the selected network;

listening, using a listen mode, on the selected cell, wherein listening enables receiving control channel information from the cell of the selected network without registering and without being in a standby mode with the selected network, wherein the wireless device is anonymous to the selected network in the listen mode;

storing control channel information;

selecting a neighboring cell of the selected cell of the selected network; and

listening on the neighboring cell, wherein listening enables receiving control channel information from the neighboring cell of the selected network, and wherein listening on the neighboring cell comprises a period of time prior to a registration with the selected network.

29. A system as in claim 25 , wherein listening comprises a period of time that the selected network is unaware of the wireless device.

30. A method as in claim 27 , wherein listening comprises a period of time that the selected network is unaware of the wireless device.

31. A method as in claim 28 , wherein listening comprises a period of time that the selected network is unaware of the wireless device.