Here is how this works: the iPhone's radio communications are handled by the Infineon S-Gold2, an ARM-based chip which also controls the JesusPhone's multimedia abilities. Its low-level functions are handled by the Nucleus Real Time Operating System which, according to iPhone Dev rebel forces, is one of the fronts that could give them a chance to try to "access or disable the lock from within the system." By reverse engineering and documenting Nucleus, hackers have reached another milestone towards freeing the phone from the AT&T network. From here, one of their objectives is to be able to manipulate the baseband's memory, so they can also change communication parameters.