Hey all! I am so hating my iphone right now because it won't run on wifi at all since upgrading to 3.1.2. (I already had my phone replaced 2x, restored, reset, restarted, etc., etc., etc. and nothing fixed the problem). After reading multiple threads here and on Apple's page about others who are having the same problem since upgrading, I was hoping to downgrade to 3.0. At least until Apple gets their act together and admits that they screwed everyone with the software "upgrade". I have a warranty and don't want to mess it up. To those who have downgraded by some means or another, is it possible to downgrade the OS without messing up your warranty? I heard the Apple store geeks/geniuses will know if you Jailbreak your phone and that will void your warranty. Any suggestions on how to downgrade on the down-low?