MuscleNerd, member of Dev-Team has sent a tweet again about OS 3.1.3 Baseband 05.12.01 unlock. Previously, he confirmed that unlock will be released for iPhone 3G/3GS 05.12.01 baseband on OS 3.1.3 in June, but in his latest tweet there seems to be a confirmation about OS/firmware 4.0 unlock as well, so this means unlock for upcoming OS 4.0 on latest baseband is possible and arriving soon! Both of these unlocks would be released at iPhone 4.0 and iPhone HD launch at WWDC 2010.
These are very clear wordings from Dev-Team, there should be no doubts about mentioned unlocks now. Let's keep our fingers crossed for updated tools. In the mean, you may go through our complete coverage on iPhone OS 4.0, please visit here.
UPDATE: It's finally here! Unlock iPhone OS 3.1.3 Baseband 05.12.08 with Ultrasn0w 0.93Contact Us for News Tips, Corrections and Feedback