http://gizmodo.com/gadgets/new-milestone/iphone-reverse-engineering-opens-new-door-to-total-unlock-284614.php

Infineon S-Gold2, an ARM-based chip

  two layers:

"First, the one running in the main CPU, the main operating system (Mac OS X). Second, Nucleus running on a secondary chip controlling the access to the baseband's memory. In other words: two doors, two locks, but also one more front to crack this Pandora's Box open

 low-level functions are handled by the Nucleus Real Time Operating System... is one of the fronts that could give them a chance to try to "access or disable the lock from within the system. From here, one of their objectives is to be able to manipulate the baseband's memory."

 What type of embedded memory is the Nucleus managing?

 http://www.mentor.com/products/embedded_software/

If they do, it will be through this assemblage.

doni