Hi, I am having a iPhone 3G with 4.2.1. 1. I want to know whether running jailbreak will wipe my data/apps or not? 2. Also if I want to revert to factory settings, will I be able to do that after jailbreaking and how? Any links to same. I read somewhere that updating to baseband 6.x.x doesn't allow you to restore to stock firmware? What is actually meant by stock firmware? Though this may be general inquiry, but I have still not able to search a concrete answer. Look forward to this which will help me a lot. Thanks.