The first time I tried this method I got a lot of disk space messages and it hung at apple logo after upgrade. Did fresh restore of 1.1.1 on up and upgraded successfully with the exception of several major problems, of which I have read of others complaining. Cannot hear any sound, for music, games, etc. No youtube videos will play through youtube app. Websearch app no longer functions correctly. Back to 1.1.2 for the time being.