I know the title's pretty vague, but that's basically my problem. I've been looking around the internet for a fix for it but hasn't seen one so far. Everything else on it works, just the wifi bar is greyed out and says "No Wi-Fi" I've tried to reset the network many times, and also tried to reboot it and also resetting the entire iphone. Also, my iPhone isn't jail broken. Is this a hardware problem? Also, would it be possible to trade it in. Although it's second hand, so I don't have the original box and receipt etc... Please help, thank you!