People who accidentally locked their i Phone on baseband will now be able to unlock their i Phone using Black Sn0w.
In this tutorial, I will assume that your i Phone is currently not jailbroken or unlocked. If not, update your i Phone to OS 3.1.2 and set it as a new phone (do not restore and set up from backup).
Update 1: i OS 6.1.6 fixes the following security issue: Update 3: winocm has confirmed that i OS 6.1.6 does not fix the vulnerabilities used in p0sixspwn jailbreak, so it is safe, but you may want to wait for them to release a new version of the jailbreak for i OS 6.1.6.
It’s official, Black Sn0w is out and available for download. This step by step guide and tutorial will show you how to unlock your i Phone OS 3.1.2 baseband with Black Sn0w.
Make sure you have an internet connection and launch Black Ra1on your i Phone.
Step 8: You will now have the option to install Cydia, Rock, or both if you choose to.
But if you have i OS 5 or higher, that's not true anymore.