I have an iphone 5 and I have a serious problem. My iphone wastes a lot of data. I keep my data turned off so I won't have overages. Most of the time I just turn on my data and get on Instagram for like 2 minutes and then turn off my data. I then check my data by typing *3282# and my data usage is up by about 20mg. I have have everything that uses data off even iMessage. Is there a way to fix it? I'm on AT&T thanks!