I recently updated my iphone 3g's version to 3.1.3(7E18) and I was wondering how i can jailbreak it. Also, when I jailbreak it, will i still have the phone icon, wifi settings, ipod, etc? Also, can it get messed up when I do and if yes is there a way i can restore it so itll be back to factory settings? One last question, whats the advantages when i do jailbreak it?