Hi, I'm hoping somebody can help me to understand some points on updating the S7 to 2.2. I know much of this is probably in the posts, but I'm looking for sort of a dummy's answer to some basic questions. 1. Why update? 2. I Understand how to do the basic update with the SD card, but the flash part has to be updated separately? Exactly how is that done? 3. If I don't back up my S7 first, what data am I going to lose? Everything? Obviously I don't know how to back up my S7, and how to root it. Is it necessary to do all that or can I just update it? Thank you for your help and your patience!!!!