DON'T DO it. I did it and u loose your warranty.you also can't plug it into your "home base" computer or download any songs from that computer. Apple will not help you if you bring it to the store. PLZ don't do it
I dont know how to do it, but i a lot of people i know do it, and i have never heard about anybody braking or damaging their phones. What i do know is that apple dont like it. But who cares about what apple likes and does not like?