Redsn0w is an alternative jailbreaking and unlocking tool to blackra1n for both Windows and Mac. In addition to the announcement of PwnageTool port for both Windows and Linux, MuscleNerd has also confirmed that iPhone Dev-Team has found the lost code of Redsn0w and that now they are going to update it to work with the latest iPhone 3.1.2 firmware.

The new blacksn0w unlock for iPhone 3.1.2 firmware can enable official tethering option on iPhone 3G and 3GS. For those of you who don’t know, Internet Tethering is a process which enables you to use your iPhone as a wireless modem to share its Internet connection with a computer via USB cable or Bluetooth interface. We have already posted a complete step by step guide on how to enable Internet Tethering option on your iPhone 3G/3GS which has been jailbroken with PwnageTool 3.1.4, and unlocked with ultrasn0w running iPhone 3.1.2 firmware. The following step by step guide is for those of you who have recently jailbroken and unlocked your iPhone using blackra1n RC3 with blacksn0w.

blackra1n RC3 with blacksn0w unlocks iPhone 3G and 3GS running on iPhone 3.1.2 firmware with 05.11.07 baseband. But like most other tools, it comes with its share of problems as well. I have received loads of emails and comments related to problems with WiFi, Youtube and GPS not working when jailbreaking iPhone 3G/3GS with blackra1n RC3, and unlocking with blacksn0w on iPhone 3.1.2 firmware. After lots of trial and error, I have found the following two workarounds which are confirmed to fix all your issues related to no WiFi, Youtube app not working and GPS issue.

blacksn0w along with blackra1n RC3 were released earlier today which can jailbreak all iPhone’s & iPod touches, and can unlock iPhone 3G/3GS running on 3.1.2 firmware with 05.11.07 baseband. You can follow the following step-by-step tutorial/guide to unlock your iPhone 3G and iPhone 3GS with the latest iPhone 3.1.2 firmware using blacksn0w from Cydia. This unlocking guide applies to iPhone 3G and 3GS users who were already jailbroken on 3.1.2 firmware using PwnageTool 3.1.4 instead of blackra1n. Those of you with iPhone 2G should follow the guide posted here or here for unlocking and jailbreaking 3.1.2 firmware.

The popular iPhone hacker Geohot has finally released the much awaited blackra1n RC3 with blacksn0w which unlocks both iPhone 3G and iPhone 3GS running on iPhone 3.1.2 firmware with 05.11.07 baseband (aka modem firmware). This latest version of blackra1n includes unlock and jailbreak for 3.1.2 firmware on 05.11.07 baseband, option for enabling native Internet Tethering on the iPhone, hacktivation support, 15 seconds speed improvement and support for OS X Tiger & PPC (PowerPC) Macs. However it is to be noted that blacksn0w is for iPhone 3G and 3GS users only. Those of you with iPhone 2G should follow the guide posted here or here for unlocking and jailbreaking 3.1.2 firmware. Here is a complete step by step guide on how to unlock iPhone 3G and 3GS running 3.1.2 firmware on 05.11.07 baseband with blacksn0w.

blackra1n RC3 is by far the fastest and the most complete jailbreaking and unlocking tool for iPhone running on the latest iPhone 3.1.2 firmware. The latest RC3 version includes blacksn0w which can unlock iPhone 3G and iPhone 3GS running 05.11.07 baseband. When iPhone 3.1.x firmware was released, Apple patched the exploit that allowed iPhone users to unlock iPhone’s. As a result, many users who upgraded to the latest firmware were left locked out with 05.11.07 baseband until geohot came to the rescue. Follow the simple step-by-step guide below to jailbreak all iPhone’s (2G/3G/3GS) and iPod touches (1G/2G/3G) on firmware 3.1.2.