wifi will not turn on, it worked before?

Do you have any more information? What do you mean before? before you upgraded the os? dropped it?

Have you tried popping the battery out and then back in?

I'll have to guess they upgraded their software to .190.... I did as well and my WIFI only connects randomly after A LOT of retries. It makes me sad on the inside =(

i tried the battery, solution it worked. thanks

Downgrade to .185. Much more stable. Or if you're good at hunting, you can find .194 on the web....