My billing cycle just started June 6, 4 days later I received message alert that I used 65% of my data. (My plan 200MB). I checked my data usage and found out every single night at 11:25PM my data was used but I didnot use my phone at that time, my data kept going up every day eventhough I didnot use it. I called ATT many times to complain about this issue, ATT suggested I should upgrade my plan so I can use my phone for the rest of the month. My concern is if the data that I donot use going up every night and I have to pay for it. Yesterday I didnot use my phone any more, this morning I checked my data usage it kept going up. Now I have to turn my phone off completely.

Is there anyone have the same problem like me?