Alpine 4A57

Alpine 4A57 is a prototype firmware found on an iPhone Prototype discussed on macrumors. According to a photo of it, it was a prototype for 1.1.3.

Restore
Instead of it being done through a ramdisk, the restore tools seem all to be right there in the OS, I guess because they originally did restores through userland.

Baseband

 * The iPhone Prototype came with 04.02.13_G

Flashing 04.02.13_G on a retail iPhone can be done with bbupdater, but results in loss of Carrier Network connectivity.