Download Redsn0w 0.9.6b4 to Jailbreak Apple iPhone 4 iOS 4.2.1

Redsn0w 0.9.6b4 for Apple iPhone 4 iOS 4.2.1 jailbreak was released by the Dev Team, it can jailbreak your Apple iPhone 4 iOS 4.2.1 with the Cydia and MobileSubstrate. If your Apple iPhone 4 was update to iOS 4.2.1, you can jailbreak it follow this tutorial to jailbreak it.

Download Redsn0w 0.9.6b4 to Jailbreak Apple iPhone 4 iOS 4.2.1

Step 1:

Download the latest Redsn0w 0.9.6b4 and iPhone 4 iOS 4.2.1 firmware. Before jailbreak make sure your Apple iPhone 4 is iOS 4.2.1.

Step 2:

Open Redsn0w 0.9.6b4.

Step 3:

Select the iPhone 4 iOS 4.2.1 firmware that you just downloaded, and it will be loading.

Step 4:

After it load complete, click "Next", select "Install Cydia".

Step 5:

Click "Next", turn your iPhone 4 off, and enter into DFU mode follow the step displayed on the screen.

Step 6:

The Redsn0w is begin jailbreak your iPhone 4 automatically, when jailbreak success, there will be a white icon of Cydia appear.

Step 7:

Turn your iPhone 4 off, open redsn0w, repeat step 1 to step 3, in the options interface select "Just boot tethered right now".

Step 8:

Click "Next", then enter into the DFU mode, boot the iPhone 4, when it complete Cydia icon will became normal.

Step 9:

Open Cydias->Manage->Source, click edit, click add to add the Cydia resource.

Step 10:

Click "Done", then click "search".

Step 11:

Search the iPa patch and afc services patch, then click install.

• How to Use Redsn0w 0.9.6b4 Tethered Jailbreak iOS 4.2.1 iPad on Windows
• Choose JailbreakMe 3.0 or Redsn0w 0.9.6b4 Jailbreak iPad iOS 4.2.1
• Use Redsn0w 0.9.7b1 Untethered Jailbreak iOS 4.2.1 iPhone 4, iPad