Today Apple Releases iOS 4.0.1 for iPhone 3G, iPhone 3Gs iPhone 4. After Releases iOS 4.0.1 redsn0w also post a new redsn0w 0.9.5b5-5 version for jailbreak for iOS 4.0.1 Mac & PC,let's start jailbreak iPhone 3G iOS 4 and iPhone 3Gs in Mac step by step guide.
Apple iOS released 4.0.1 was earlier today for iPhone 4, iPhone 3G and iPhone 3GS your baseband wasn't upgraded (modem firmware) which it means now you can unlock your iPhone even on the latest iOS 4.0.1 firmware. Currently there is no unlock and jailbreak tool available for iPhone 4 and iPhone 3Gs (new bootrom) UltraSn0w unlocked tools it's available for iPone 3G, iPhone 3Gs (old bootrom) About only work unlocker these baseband (modem firmware) 04.26.08, 05.11.07, 05.12.01, or 05.13.04.
If You want to go back to iPhone 3.1.3 / 3.1.2 Downgrade iOS 4, iOS 4.0.1 iPhone iPod touch to 3.1.3 / 3.1.2 the following step by step guide will help you downgrade to 3.1.3 / 3.1.2 .
you have need to saved SHSH blobs, old firmwares 3.1.3 or 3.1.2.
If you want to go back to iPhone 3.1.3 / 3.1.2 or Downgrade iOS 4, iOS 4.0.1 iPhone iPod touch to 3.1.3 / 3.1.2 the following step by step guide will help you downgrade to 3.1.3 / 3.1.2 .
you have need to saved SHSH blobs, old firmwares 3.1.3 or 3.1.2.