Apple iOS4 is finally out and so does the jailbreaking and unlocking utilities, the iPhone Dev Team has posted updates to their iPhone Jailbreaking utility redsn0w and carrier unlock ultrasn0w to support the newest iOS version with latest baseband (05.13.04) - this means that users can now safely update their iDevices to current iOS version without worrying about loosing there unlock and jailbreak ability.

After getting success in jailbreaking iOS 4 there is another interesting development from iPhone Dev Team member musclenerd, few hours ago he tweeted confirming the upcoming final version of iOS 4 as unlockable even on the newer Baseband v 05.13.04, also pointing out