While Sn0wbreeze 2.7.1 can already jailbreak iOS 4.2.8 on Verizon iPhone 4, the problem is that it is for Windows users only. If you happen to be a Mac user, and want to untether jailbreak your Verizon iPhone 4 on iOS 4.2.8, you can do so now with this PwnageTool bundle.
iPhone developer ih8sn0w has updated Sn0wbreeze to version 2.7 in-order to include support untethered jailbreak for iOS 4.3.3 (iPhone 4, 3GS, iPad, iPod touch) and iOS 4.2.8 on Verizon iPhone 4.
iPhone developer iH8sn0w has just pushed yet another update to Sn0wbreeze, bringing the version number up to 2.2.1. This new release fixes issues when jailbreaking Verizon iPhone 4 on iOS 4.2.6, adds drag and drop IPSW files support, 100% fixes the iBooks issue, and all the issues that you maybe experiencing when using Windows classic theme.
So as it turned out, the Verizon iPhone 4 is vulnerable to Limera1n bootrom based exploit, and untethered GreenPois0n kernel based exploit which makes it possible to jailbreak on iOS 4.2.6, untethered using GreenPois0n RC5.4.
Moments ago, Apple seeded iOS 4.2.6 to public for Verizon’s CDMA iPhone 4 ahead of its launch date, that is February 10th, 2011.
An Italian site contacted Comex today to ask him about whether he is going to wait for Verizon iPhone 4 to launch, and the next iOS release, that is iOS 4.3 / 4.2.5 before releasing his untethered jailbreak. Comex swiftly replied that one month is too long a wait to keep the long-awaited untethered jailbreak from releasing.