Recently (about 3 or 4 months) my phone wants to connect to the local Wi-Fi (mostly the Xfinity I am an Xfinity customer), I may be in the middle of doing something with the phone and suddenly it tries to connect to Wi-Fi the screen changes and eventually states that it can't connect. I then turned off the Wi-Fi and location functions, through the settings screen then later they are back on (I did not manually do this).
For the last few months my data usage has been extremely high and when I check the data usage it shows a lot of data usage when I am asleep.
Other then turning the phone off at night I am not sure what to do!!