As you would know by now that GeoHot has released BlackSn0w to unlock iPhone 3GS and 3G on Baseband 05.11.07. So, it’s time to write a guide on how to Unlock iPhone Baseband 05.11.07 using BlackSn0w.

In order to use BlackSn0w, you need to jailbreak your iPhone3GS, 3G first using BlackRa1n RC3. Your iPhone MUST have Baseband 05.11.07.

Update to OS 3.1.2, Baseband 05.11.07 and Jailbreak your iPhone with BlackRa1n RC3:

How to Jailbreak iPhone, iPod Touch OS 3.1.2 Using BlackRa1n RC3

ATTENTION loyal BlackRa1n user: (If you’re NOT a loyal BlackRa1n user please skip this step and continue.)

If you’re a loyal BlackRa1n user and still have BlackRa1n.app icon on your iPhone,you don’t need to jailbreak again just open the BlackRa1n from iPhone and hit the Ra1n button. You will see Icy replaced by an option “ra1n“. Install this to upgrade your app. After upgrading, run blackra1n.app again. You will see “sn0w”. Install this, and enjoy your unlocked iPhone.

Users who have already jailbroken their iPhones with Baseband 05.11.07 can Unlock their iPhone in two ways.

1. From Cydia
2. Using BlackRa1n.app

Both methods to Unlock iPhone Baseband 05.11.07 are mentioned below (Use any one of these).

1- Unlock iPhone Baseband 05.11.07 Using BlackSn0w (Cydia)

Open the Cydia and go to Manage Tab and Select Sources.
Press the Edit button at top-right

Press the Add button at Top-Left
Input the Source: http://blackra1n.com and hit Add Source.

Now Press Return to Cydia button.
then press Done at top-right

Now select the just Added BlackRa1n.com Source.
Then Press BlackRa1n to install it

Press the Install button at Top-Right
Then Press the Confirm button at Top-Right

That’s it… You have successfully unlocked iPhone on Baseband 05.11.07.

2- Unlock iPhone Baseband 05.11.07 Using BlackSn0w (BlackRa1n.app)

Now considering that your have successfully jailbreak your iPhone using BlackRa1n RC3 using the guide linked above.

Open the BlackRa1n app from your iPhone

You will find three packages available there.

Press the Sn0w option to unlock your iPhone 3GS, 3G Baseband 05.11.07 and hit the install button.

BlackSn0w will be downloaded and then installed.

You will be presented with a Post Install log for Blacksn0w. CommCenter will be restarted and there is no need to reboot. If your carrier doesn’t support 3G then disable it. Press the Close button to continue.

Your iPhone will then be Respring.

Congratz! you have successfully unlocked iPhone OS 3.1.2 on Baseband 05.11.07.

If you’re having issues with WiFi, YouTube, or GPS then follow this guide:

How to Fix WiFi, YouTube, and GPS Issues of BlackSn0w Unlock

Jailbreak iOS 4.0

• How to: Jailbreak iOS 4.0

Unlock iOS 4.0

• How to: Unlock iOS 4.0

Update 1: Jailbreak iOS 4 with PwnageTool

Update 2: Jailbreak iPhone 3GS iOS 4 with PwnageTool

Update 3: Jailbreak iPhone 3G iOS 4 with PwnageTool

Update 4: UltraSn0w 0.93: Unlock iPhone 3GS, 3G (All Baseband)

Update 5: Unlock iPhone 3G iOS 4 with UltraSn0w 0.93

Update 6: Unlock iPhone Baseband 05.13.04 with UltraSn0w 0.93

Update 7: Unlock iPhone Baseband 05.12.01 with UltraSn0w

Update 8:
UltraSn0w 1.0-1 is OUT now.
How to: Unlock iPhone 4 iOs 4.0.1 with UltraSn0w 1.0-1 Baseband 01.59.00