How to: Jailbreak and Unlock iPhone 4 on iOS 4.0.1 / 4

May be most of you jailbroken their devices with JailbreakME 2.0 and unlocked your iPhones using Ultrasn0w 1.0-1 which was released today, but we would like to cover the full guide to jailbreak and unlock any iPhone on any iOS on any Baseband including Baseband 01.59.00.
Note: If you don't have the original SIM Card and stuck on "Emergency Call" , you can activate your iPhone by buying Phonebook card from Phonebookcard.com here, then use the guide by Sherif Hashem to activate iPhone 4 / 3GS / 3G without Original SIM Card posted here.

Jailbreak your Device: 
Step 1: Open your Safari mobile browser, and navigate to http://www.jailbreakme.com and now "Slide to Jailbreak"

Step 2: It will now go in two continuous processes, just sit back and let JailbreakMe jailbreak your device,

Step 3: Then, it will tell you that Cydia installed successfully on your device as shown in the screenshot,

Unlock your Device:
Step 4: After jailbreaking, press Home Button and touch on “Cydia”

Step 5: Now Touch on “Manage --> Sources”

Step 6: Touch on “Edit” and then on “Add”. Type http://repo666.ultrasn0w.com then hit “Add Source”. Ultrasn0w will be added to your Cydia Source lists.

Step 7: After installing Ultrasn0w, navigate to your Cydia Source list, and search for “Ultrasn0w 0.1-1”, then it will be installed automatically.

Wow, you just got a jailbroken and unlocked iPhone 4, You are free now from Apple's app store and AT&T carrier! Good luck!

Download iTunes 9.2.1 for Windows & Mac
Download iOS 4.0.1 for iPhone

You may also like:

• List of iPhone 4 / iOS 4 Compatible Cydia Apps
• Download iOS 4.1 Beta 3 for iPhone and iPod Touch
• PDF Loading Warner available in Cydia [Automatic Method]
• How to: Fix Purple Screen when Jailbreaking using JailbreakME

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Categories: Apple , Apple Guides , iphone , iPhone 3G , iPhone 3GS , iPhone 4G , Jailbreak , JailbreakME , Unlock