This article discusses software internally used by Apple.
Acquiring a copy without Apple's consent is illegal and may result in being scammed.
This is an internal firmware based on iPhone OS 1.1.3. It is extremely similar to Alpine 3B48, appearing to be a newer version with minor changes. It was first seen on a prototype of the original iPhone.
This firmware - much like most of the Alpine Non-UI firmwares - features one main app that is used to test the various features, functions of the device hardware - SkankPhone.app. This version also features an Operator screen, as do the previous Alpine firmwares.