My jailbroken 4g ipod touch is currently on 4.2.1 firmware and I would like to get it too 4.3.3 firmware. Whenever I try to download and update the firmware with itunes it says the firmware won't work for the requested device or something like that. I also tried restoring but the same error pops up for that. I have the lastest version of Itunes so that isn't a problem. I can't seem to download anything on cydia because for some reason the original sources won't work and if I try to add any there are a bunch of errors. I am trying to upgrade because I read that upgrading may solve that problem. Any ideas what to do? Thanks in advance.