Hi schettj,

I disabled the GPS and Network position as well with no change.
I also ruled out my Gmail addresses, Touchsearch and Google Talk IM.

Would it be possible that it is just an automatic ping generated by my phone or by any app?
Using wireshark, I could identify the ip address as 169.102.9.xx, which is www.google.com
But it seems to a be a constant communication between my phone and this server so the amount of data gets really high, reported as 1601kb by my carrier every 3 minutes.
I contacted T-Mobile and they told me they would look into it but I think it's coming from my phone, as I have the same problem when using Wi-Fi.

This is really bugging me...