I updated my iPhone 3GS to 4.3.3 yesterday and ever since, my phone seems much more sluggish than it has in the past. Things like typing in text boxes on the Internet have a slight delay, etc. So, I want to downgrade back to 4.2.1 (which is what it was on before). I have downloaded the 4.2.1 firmware off the Internet and I have changed the hosts file to include "188.8.131.52 gs.apple.com" but every time I try to do the update, I get an error saying "The Iphone could not be updated. An unkown error occured (3194). I have also tried to do this on the mrs' MBP but I get an error saying my iPhone isn't eligible. Has anyone got any ideas on how I can get round this please?