I am on AT&T. I was using an HTC one M7, and I had a problem with the WiFi. The phone would always try to connect to an open WiFi. This would not be a problem, except when a password or sign in was required, no connection was actually made. When this happened, I had no LTE or Wifi connection, and my push notifications would all stop because there was no internet connection. When I manually turned off WiFi, LTE would now start to work. However, a few minutes later, the WiFi would try to connect again, and I ounce again lost the internet connection. I never found a way to stop the WiFi from trying to connect to bad WiFi networks. I thought it was because of some At&T bloatware that I could not uninstall. So when I got the opo, I thought this would not be a problem anymore - WRONG! It does exactly the same thing. Is this the sim card that is doing that? How do I prevent the WiFi from connecting on it's own. Of course I turned it off in the settings - that does not work. This is driving me nuts!