All tests are performed via a usbmux interface. During that time the iPhone displays a picture of a fireball. Partial output is displayed at the bottom.
However when display tests are run, different output is produced.
After booting up, SwitchBoard.app screen shows up allowing you to choose different options.
They consist of:
- AT Command
The firmware includes standard set of UNIX binaries. apt-get is present suggesting that there is an internal APT repository.