my iphone can't find any wifi network or sometimes the wifi is grey out, this happend since i had the 2.2.1 firmware it work like 2 months ok but then the issue appears, i try eveything restore network settings, hard resets, etc, now i upgrade to the 3.1.2 but i still without wifi, the only weird think that i can see is that when i start to make the upgrade i saw an image of a guy and a some rusian words, and after the upgrade was made i saw the bootneuter 2.1 changing some seetings, i have 1 month with this problem please somebody help