I've encountered a problem with an iPhone 3G v3.1.2 using Blackra1n RC3, which has no WiFi connection - grey out. And without WiFi, I can't complete BR or install Cydia. I've tried Make_iTunnel.exe but that comes up with various errors including QTCF.dll missing and can't find apple.com. I'm completely stuck and it's not my iPhone, any help? Or is the WiFi chip dead?