I turned it on to see what it would do last month. Three days before the end of the month, I got notification from my provider that I had used up all of my 1GB of data. Now, I have NEVER EVER used more than .5GB in a month since I work from home and my phone usually uses up the wifi there. I called my cell phone provider and they weren't very helpful - they kept saying that I must have had a lot of downloads. It's turned off now and I really caution everyone to leave it off.
