I remember when I got my Iphone 5 that at the time there was a problem with ios using cell data while connected to wifi networks that was fixed in the first update. Im feeling like there is a similar issue this time around also as in a matter of a couple hours I some how used nearly 1gb of data when on average with iphone 5 id use about 1gb a month. Im always connected to wifi at work and home so only time ever not connected to wifi is on commute. Please let me know if anyone else is having issues. All ATT told me to do was to turn of Cell Data when I dont wanna use it, which is stupid to have to turn on anytime I wanna connect, but yeah.