For no apparent reason today, my Nexus 4 dropped the connection with my wi-fi network. The wi-fi symbol (with gray or blue bars) doesn't show up in the status bar, at all. I've tried everything I can think of--unplugged the modem, turned off/on the phone's wi-fi, restarted the phone...nada. My wife has a Nexus 4, and it recognizes the network with no problem. Same with our computer. So there's obviously no problem with the modem itself. I've also tried forgetting the modem's password in the hopes that entering the password again would help, but nothing. The phone shows the network in the list of available wi-fi networks, but when I select mine and hit "connect," literally nothing happens. I'm completely baffled--anyone have any ideas? Thanks!