I bought an Acer 7 inch tablet barely 6 weeks ago. It worked fine until yesterday. Now it can't connaect to the internet. It keeps trying to obtain an IP address to connect, but can't. After repeated tries it stops and says there is a configuration failure. Apparently it is true of all android devices. I tried my Irulu 10 inch tablet--same thing. Even my Android phone doesn't obtain an IP address. It isn't my house so I am afraid to play with the router. I may try to reboot it. - FIXED! I rebooted the router and everything works again.