As you all know, the iPhone Dev Team has recently released the source code of the program anySIM to allow other budding programmers improve the application. True enough, coder Zibri just came up with a new build.

Dubbed anySIM v1.3, this particular release is capable of unlocking baseband 4.03_13_g. Zibri provided the following information:

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.

Take note that anySIM v1.3 doesn't come with its own Readme.txt file so be sure that you know exactly what you are doing to avoid any problems. Despite the claims of the latest build, there are still uncofirmed reports about a new iPhone firmware that is capable of blocking all kinds of jailbreaks.