either use the latest Sn0wbreeze 2.6.1(windows only! if you're on mac use redsn0w or ask someone that has windows to make you a custom firmware) and cook up a custom firmware and restore to it. if you've used the latest redsn0w before to jailbreak it and have been stuck with a "tethered" jailbreak you can "un-tether" it with this patch from cydia under the repo named "http://cydia.pushfix.info" and it's called "Verizon Untether for 4.2.7".
more info here.
more info here.
Last edited: