I've searched. I see people adamantly stating they would restore as new. But my question is... why? Does Erase All Content and Settings do the same thing? If not - what's different/better about restore. Considering I JUST did a backup and don't *think* I need to do another - could I just do the Erase All Content and Settings. Another reason I'm asking is because I am considering getting an iPhone 4 and don't want to be without my 3GS. I might do the Best Buy or RS trade in - but wouldn't want to do that unless I knew I was getting a phone then as well. So I was hoping I could just (at the store) click on the Erase All Content and Settings and then hand over the phone thoughts? safety? security?