I have an iphone 4S running iOS7 on AT&T grandfathered unlimited data . Data History: Jan 2013 - 0.9gb Feb 2013 - 0.8gb Mar 2013 - 1.7gb April 2013 - 2.7gb May 2013 - 2.1gb June 2013 -1.6gb July 2013 - 1.8gb Aug 2013 - 1.8gb Sept 2013 -2.1gb Oct 2013 - 1.8gb Nov 2013 - 2.4gb Dec 2013 - 3.2gb Jan 2014 - 3.2gb I haven't had any behavor or habit changes. Still using my Wifi at home and everywhere I can. I'm trying to think of any new apps I downloaded that might cause this. Maybe location services? Changes in the OS? I know the 3gb isnt that much more than 2gb but this past January and December I hit 3gb with 10 days left in the period. I am on the AT&T unliimited (grandfathered) so when I hit 3gb the device is pretty much useless (avg 6mbps throttled down to 0.2mbps) which is my biggest frustration. Anyone else having this problem? Ditch unlimited?