Third Data Connection Icon - What is it?

Hello all,

I just have a quick "out of curiousity" question for everyone: on the iPhone there seem to be three possible data connections - two of which are the 3G network, represented by the little 3G logo beside the carrier name, and Edge, represented by the "E" symbol. However, on a trip to a rural area, I noticed a third symbol - a blue box with a little white circle in it. Does anyone know what the name of this data connection is? It was very slow, so I'm just curious...

Thanks in advance!

 

Ah, OK, thanks to everyone for the answer. I'm kind of slapping my forehead here because I should have thought of that but it didn't cross my mind. It felt very much like a dial-up connection so I'm kind of surprised by the fact that it is GPRS. I guess on WAP sites GPRS is good enough...

Thanks again!

P.S. I didn't see the earlier thread and I did do a search but I guess different keywords must have been used.