Alpine 3B48

From The Apple Wiki
iPhone prototype running in 3B48
2007 iPhone PVT running SkankPhone in 3B48

This is a factory firmware based on iPhone OS 1.1.2. It appears to be a newer version of Alpine 1A420, featuring a newer version of SkankPhone with the built-in Operator screen. It also has the ability to exit SkankPhone and boot into, where one can find the following applications:

This firmware was originally spotted on a 2007 iPhone PVT but has since been seen on multiple devices.