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.
The coming with more revolution technology, and will come with a exciting new features, all packaged in a totally redesigned handset. The iPhone 6s equipped with 3D Touch, upgrade camera optics and faster processor, but here, rumor suggest that the upcoming iPhone will need bring an even bigger up-gradation for massive competition from Samsung, LG and other Android smartphones, it means that Apple will need to raise its upcoming phone and make the best iPhone ever.