I am officially disputing that so called 1600mb of data usage ATT says I used.  There is NO WAY IN THIS UNIVERSE I used that Data.   Thanks to another poster that recommended My Data Manager, I have used 7 GB's  of Wifi (only because I uploaded all my pics to Dropbox)  and only 160 MB of 3G in 10 days.  That's about 13 MB / day.   I even watched a few You Tube videos on 3G and I used "Map My Walk" on 3G for 90 minutes on Saturday evening.   (but I learned on Sunday you can use Map My Walk w/ data turned off!)    If I were to actually use 13mb/day I'd still only use 390mb for the month but for two days now I've used no data because I was at work and at home and didn't use my phone other than there.  

There ARE 12 days left in my month, so I suppose I have to wait until the 8th to dispute it.  I obviously didn't go over my data, and I won't regardless, but I just want it noted that I AM disputing that 1600mb of data usage.   

I'll update when the time comes to let you know what they say.