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Hi Everyone.I have a Iphone 3gs with 4.2 firmware.I want to jailbreak and unlock it but I have a few questions.Btw,I have a mc model. 1.What's the best tool to use to jailbreak my Iphone ? 2.How can I unlock it? 3.Is the jailbreak going to be tethered? If so, How would I re-boot it jailbroken...