I am hopefully unlocking an iPhone on Wednesday. I know I have the choice between iJailBreak 0.5.3 and ZiPhone 2.4. Based on scouring these forums, I think I am going to go with ZiPhone 2.4. (If people agree or disagree, do let me know). ZiPhone 2.4 looks perfect, but I have seen varied reports; some say it downgrades the bootloader, some say it doesn't. I need one answer, full stop. Does it downgrade it or not? If it does, is it a bad thing and can it be reversed? Does iJailBreak do this? Thanks!