a couple of my friends said they had done it and it worked. but i'm still not 100% sure and thought i'd post it on here to see your thoughts and to see if it actually worked. i have over 400 apps, 6000 songs, and around 100 videos including movies, tv shows, podcasts, and music videos. so i'm interested in this because i might be able to find a way to upgrade without restoring. i also have shsh blobs for 4.0, so that's not a problem. i just want to know if there's a way to do it.