For the first time I'm going to use mobile data for the whole day, today.

Since 8am this morning all I've done is visit the Kiwibank main (not mobile) page (I had some error on the phone and was testing if ANY site was able to be loaded), and the m.trademe.co.nz

I haven't visited any other websites and I presume that the mainly text m.trademe site doesn't use a lot.

I loaded the "Stocks" and "Weather" applications once each, and the rest of the time I only used my Yahoo and Gmail (checking only, not sending).

It's 11am and I've already used 2.5Mb???

What's going on here?