The iPhone-Dev team today released Redsn0w 0.9.6 b5, a carrier unlock and hactivation tool for iPhone 3G and iPhone 3G S with iOS 4.2.1. Redsn0w 0.9.6 b5 is the PwnageTool 4.1.3 alternative for Windows. It can be use to upgrade the modem firmware version in iPhone 3G and iPhone 3 GS from 05.14.02, 05.15.04 or higher to the unlock supported baseband 06.15.00. Here we use iPad OS 3.2.2 with Redsn0w 0.9.6 b5 to update the baseband of the iPhone 3G or iPhone 3GS to 06.15.00. After the baseband upgrade, we can use Ultrasn0w 1.2 to unlock the device.
Here is a good news for iPhone 3G and iPod Touch 2G jailbreakers, as the Dev-Team has just released a fresh beta version of redsn0w, version 0.9.6 beta 1, which allows users to jailbreak iPhone 3G and iPod touch 2G on iOS 4.1/4.2, the new redsn0w version uses the same pwnage2 DFU-mode exploit that was previously used since the 2.x days. UPDATE 1: redsn0w 0.9.2 is now available and can be downloaded from the link here. UPDATE 2: The iPhone DevTeam has now released redsn0w 0.9.3. This version brings IPCC tethering hack for iPhone 3G and 3GS only. Complete step by step instructions can be found here. Download the Original iPhone OS 3.1.2 firmware for iPhone Download redsn0w 0.9 (final version) for Windows Fast Mirror link.
Redsn0w 0.9.6 b5
How to unlock iOS 4.2.1 on iPhone 3G and 3G S with Redsn0w 0.9.6 b5 for Windows.
Download the iOS 4.2.1 ipsw file for iPhone 3G or 3G S.
Run Redsn0w 0.9.6 b5 and point it to the downloaded iOS 4.2.1 ipsw file. Windows 7 and Windows Vista users should run Redsn0w 0.9.6 b5 in compatibility mode for Windows XP.
Redsn0w 0.9 6 Beta 2.4
In the next step select, install Cydia ( if not jailbroken already) and iPad baseband. Take your iPhone 3G or 3G S to the DFU mode whenever required by the Redsn0w 0.9.6 b5 interface.
After this your device will be update to the modem firmware 06.15.00. Please note that this is permanent and irreversible.
Open Cydia and proceed to unlock with Ultrasn0w 1.2.
Redsn0w 0.9.15b3
While flashing with Redsn0w 0.9.6 b5, please make sure that your iPhone is always connected via USB.
Redsn0w 0.9.6
Update (we recommend this version with bug fixes): Download Redsn0w 0.9.6 b6 compatible with SAM.