maybe, but it does jailbreak the cdma, and i should also say that, i've never had to jailbreak a cdma iphone and so never had to use redsnow to do so, so i have no personal experience in it, but those with cdma iphone who jailbreak using redsnow report of successful jailbreak.It definatly never used to be able to do it. GSM iPhones had the choice of using snowbreeze or redsnow while verzion users were stuck with snowbreeze. After reading up on it the redsnow jailbreak for 4.2.8 seems more complicated than snowbreeze...