ultrasn0w

The iPhone Dev Team was a group of engineers in the iOS (formerly iPhone OS) community which had developed several tools to enable use of applications not authorized by Apple Inc on the iPhone, iPod Touch and iPad, and to enable use of the iPhone on GSM carriers not contracted by Apple. These applications provided owners with the ability to sidestep the limitations placed on the devices by the manufacturer, allowing for activities such as deep customization and easy international roaming. The group and their tools became emblematic for these activities, which are termed jailbreaking and SIM unlocking respectively, to the extent that the Electronic Frontier Foundation made them the primary example used in their petition to create a DMCA anti-circumvention exemption for jailbreaking and Apple executive Greg Joswiak (Vice President iPhone Product Marketing) quoted them in his countering comment to the same petition.Products maintained by iPhone Dev team include:

ultrasn0w is a program created by the iPhone Dev Team which provides an unofficial carrier unlock for jailbroken iPhones. The current supported baseband versions for 3G/3GS for this unlock tool are 4.26.08, 5.11.07, 5.12.01, 5.13.04, and 6.15.00. The only current supported baseband for iPhone 4 GSM is 1.59.00. (The "baseband" version is called the "modem firmware" version in the iPhone Settings app.) ultrasn0w 1.2.4 (and later) uses the same AT+XAPP command exploit found in the 05.13.04 baseband to update the iPhone 3GS's baseband to version 6.15.00 (found in the iPad 3G).
redsn0w is a program which allows users to jailbreak their iPod touch, iPhone and iPad by using various exploits. The first version released was 0.7 to jailbreak iOS 3.0 on the original iPhone, iPhone 3G and iPod touch 1G/2G.
PwnageTool is an iPhone jailbreaking application for Mac OS X that creates custom iOS firmware images to user-defined specifications. These firmware images often contain the APT interface Cydia as well as additional APT packages. Although PwnageTool is only for Mac OS X, a Microsoft Windows version called WinPwn was developed but is now retired. PwnageTool is freeware but not open source, and as mentioned inside the application, is copyrighted by the iPhone Dev Team.

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