Check his blog!
Clarification added on the blog:
"This is Version 1.3 Of anySIM.
This version unlocks baseband 4.03_13_g
It's only for bootblock 3.9 don't use on 4.6
To use it, upgrade the baseband then
put the iPhone in airplane mode and run it !
It works also in JB 113 OS... "
credit goes to...
I'm just quoting stuff here..
N41"Everyone who worked on anySim 1.2u
Gray for the baseband work..