Just figured I would add this. This isn't a sure-fire way, but if you want to try, if you disconnect during update to 4.1 then after a while, through various entering's of restore/DFU mode, it clanks out of the update process,or so it did for me. After trying to downgrade to other versions various times I did the restore mode process(tried this several times too) half way and it disconnected twice, connected once, took a bit and then came back to the version I orginally had it. Also, if you try this, do not blame me if something goes wrong. I'm just saying how it worked out for me. Try at your own risk.