I upgraded to a Samsung Galaxy Note 4 just over a week ago. In that time, I have noticed that the WiFi setting randomly turns off, so then my phone uses data instead of the WiFi. It's quickly eating through my data. To prevent it from eating up anymore of my allotted data, I turned off Mobile Data. But this is not a permanent solution because I want to be able to use mobile data when I am between my WiFi networks; for example, while carpooling from home to work and back. It's a pain to have to go in and turn on mobile data, do what I need, and then remember to go back in and turn it off. This seems like a bug since it's a brand new phone (I've had it for 8 days) and it randomly turns off the WiFi.
