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: