iPhone Dev Team has released Ultrasn0w v1.1-1, an update to Ultrasn0w v1.0-1. iPhone Dev Team has tweaked few things which will ensure better battery life, performance and more stability on all iPhone 4 devices. Like the previous release, Ultrasn0w v1.1-1 can unlock iPhone 4 running iOS 4.0 / 4.0.1 with 01.59.00 baseband and iPhone 3G, 3GS with 04.26.08, 05.11.07, 05.12.01 or 05.13.04 baseband version.
The procedure for upgrading to Ultrasn0w 1.1-1 is similar to installation of Ultrasn0w 1.0-1 on iPhone 3G, 3GS and iPhone 4. Just jailbreak your device using JailbreakMe and unlock it using the updated version of Ultrasn0w by adding http://repo666.ultrasn0w.com to your Cydia sources. [via iPhone_Dev]
Update 1: iOS 4.0.2 for iPhone 4, 3GS, 3G & iPod Touch 2G, 3G Released!
Update 2: Apple Released iOS 3.2.2 for iPad [PDF Exploit Patched]
Update 3: Jailbreak iOS 4.0.2 on iPhone 3G & iPod Touch 2G with Redsn0w 0.9.5b5-5
Update 4: Unlock iPhone 3G on iOS 4.0.2 with Ultrasn0w 1.1-1