Jailbreak and Unock iPhone 4 baseband 01.59.00 and iPhone 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04 and now 06.15.00.

Step 1_ (Save Your iPhone SHSH optional) http://gfgsm.blogspot.com/2010/12/new-save-shsh-blobs-directly-from.html

Step 2_ (Jailbreak with Fixes) http://gfgsm.blogspot.com/2010/12/download-redsn0w-096b6-beta-6-to.html

Step 3_ (Unlock) http://gfgsm.blogspot.com/2010/11/now-ready-new-ultrasn0w-to-unlock-for.html

Step 4_ (Hactivation Your iPhone) http://gfgsm.blogspot.com/2010/12/iphone-how-to-hactivation-your-iphone.html

Problems
If Restore Problem iPhone 3G, 3GS -- After Using Ultrasn0w 1.2
http://gfgsm.blogspot.com/2010/12/restore-problem-after-using-ultrasn0w.html

Jailbreak and Unock iPhone 4 iOS 4.2.1

BB = 3.10.01
(Jailbreak only) http://gfgsm.blogspot.com/2010/12/download-redsn0w-096b6-beta-6-to.htm


BB = 1.59.00
Step 1_ (Save Your iPhone SHSH optional) http://gfgsm.blogspot.com/2010/12/new-save-shsh-blobs-directly-from.html
Step 2_ (Jailbreak with Fixes) http://gfgsm.blogspot.com/2010/12/download-redsn0w-096b6-beta-6-to.html
Step 3_ (Unlock) http://gfgsm.blogspot.com/2010/11/now-ready-new-ultrasn0w-to-unlock-for.html
Step 4_ (Hactivation Your iPhone) http://gfgsm.blogspot.com/2010/12/iphone-how-to-hactivation-your-iphone.html