It shuts off when I'm using my phone.
It shuts off when I'm trying to enter my Wifi password.
It shuts off when I was trying to run speedtest.
It doesn't remember my Wifi password.
I get a pop up that says "Wifi Powering off" sometimes.
It goes on/off by itself for no reason.
After 3 reboots, it seems to be working again.
Weird.
If you are on at&t, try turning off the att smart wifi app.