Jailbreaking and unlocking iOS 4.0 running on iPhone 3Gs, 3G and iPod Touch 2G have been leaked out for some.
However as the final version release of Apple iOS 4.0 has been made officially, the iPhone Dev Team has also updated needed tools to jailbreak and unlock iOS 4.0. iPhone Jailbreaking utility (redsn0w) and carrier unlock (ultrasn0w) support the newest iOS version with latest baseband (05.13.04) which means that users can now safely update their iDevices to current iOS version without worrying about loosing there unlock and jailbreak ability. The RedSn0w has reached RedSn0w 0.9.5b5-3 and UltraSn0w has reached UltraSn0w 0.93.
And here there are mirror download links to grab RedSn0w v0.9.5b5-3, meanwhile the UltraSn0w v0.93 is available for download via Cydia app on your iDevices.
Download RedSn0w v0.9.5b5-3 (Windows & Mac)
RedSn0w v0.9.5b5-3 for Windows:
You could always get support from UnlockAlliPhone.com about any Unlock & JailBreak issue of any model of iPhone including iPhone 2G,3G & 3GS and also upcoming iPhone 4. They provide Premium Members Support for life time. Means just pay one time a small fee and you will receive support(real human support – avg response time 2 hour) for all present & future version of iPhone.