ApexNanshan 8A2130h

From The Apple Wiki
iPhone 4 running 8A2130h

A 4.0 based firmware used for testing iOS devices. Found on an iPhone 4.

Toolkit

After booting up, SwitchBoard.app screen shows up allowing you to choose different options.

They consist of:

Binaries

The firmware includes standard set of UNIX binaries. apt-get is present, suggesting that there is an internal APT repository.