I have the Android ZTE phone I purchased from Boost. Turn off Wfi when using the navigator. The WIFI turns back on asking me to connect to XFINITY, if I do nothing the screen turns off. Here I am traveling down the tollway with no direction. I am forced to bring screen back with my code, turn off WIFI then turn navigator back on. This is a life threatening situation. If I turn WIFI off it should never turn back on. How do I stop this?