I am debating on wither or not to jailbreak my Ipod 4th generation with iOS 4.2.1. I have a few questions 1. What is the best Jailbreaking software? I have heard of greenpoison but thats it... 2. If I jailbreak my ipod can it break the ipod? 3. If I jailbreak it, will I lose all of the save data on my apps? (this is big as I have games like infinity blade where it took me a long time to get where I am) 4. will it pose any risk to me if I have all my email and everything signed in? 5. Is this illegal? Thank you for helping me and I would like an answer from someone who has an eyewitness account of it, thanks!