How To Jailbreak & Unlock Iphone 4 FW 4.0.2 BB 01.59

First You need to download :
- Limera1n for Windows
- Limera1n for MAC

Plug your iPhone in and Lunch Limera1n and then click 'make it ra1n'

 Follow the screen instruction : Hold the home and power button together.

 Release the power button

 Limera1n will have your iPhone enter to DFU mode and then will Jailbreak your Phone

 Your phone now almost jailbreak and you see the following the messages.

 If you dont see the Limera1n icon on your iPhone, simply reboot it and then launch your iPhone and select cydia to install.

 Press to Launch Cydia installer

 Press to select the MANAGE tab at the bottom of the screen

 Press to select SOURCES button

 If the ultrasn0w repo is not present, simply press the EDIT button at the top of the right of the screen. Otherwise skip to the next 

 Press the ADD button at the top left of the screen. 

 Enter http://repo666.ultrasn0w.com in the url and press ADD SOURCE

 Once the source has been added press the large RETURN TO CYDIA button

 Press DONE button at the top right of the screen 

 Press to select REPO666.ULTRASN0W.COM from the list.

 Press to selet ULTRASN0W

Press the INSTALL button at the right top of the screen. 

 Press the CONFIRM button at the top right of the screen.

 After installation complete. Press RESTART SPRINGBROAD at the bottom of the screen.

UNLOCK Successfully.