iphone 4 sending out data over 3g when connected to wifi?

so i am having an issue i know it may not be that big, but it still bugs me/ puzzles me nonetheless.

So ever since getting my iphone4 a few days ago i have been more or less constantly connected to wifi, but for some reason when i do *data#, it says that ive used almost 2MB of data. Now to most of you that may not seem like alot, but the problem is i have been connected to wifi this whole time, and i dont believe data should have been sent out. last night i went to sleep at about 4 and 1.4MB was used and now when i wake up 1.7MB was used.... whats going on here!

Now the reason im so concerned about this is because i am only on the 200MB limit and only want to be using data when i have to, and not having data being sent out randomly without me even doing anything!

i have notifications off( not sure if this does anything), and under mail i have fetch new data off/ push off/ fetch on manual, and the facebook app i turned all push notifications off.

I think i turned all those off properly.... if not could anyone put some direction on how to turn all all that stuff (just incase im missing something?)

But yea... so anyone have any suggestions on why data is being transferred when im not even using the phone??

thanks for any help!

 

will that allow me to still receive calls/ texts? I was reading on apples website what that does and was somewhat confused as it said no MMS and other stuff.... But even without disabling it shouldnt my phone not be sending data out? Or do all phones send data periodically?

 

okay well it looks like i can still get texts and calls with it off!

But back to the original question. what could be causing it to be sending out data by itself? If i have to i will disable cellular data when i dont need it, but if i can get away with not doing that itd be bettter because turning it on and off every time i need it seems like if be a hassle to me.

 

no i am limited to 200MB of data per billing cycle. Is there any way to turn off all location services? in general>location services i have location services on, but all the apps below it are off... Should i just turn location services off completely?