if you consider the cost of all the miutes you use poking along at an average of 8kbits/second, you will probly save money being billed by the kbyte.
with csd i get about 50kbytes per minute
so 2 megs will take about 400 min
with 3g you get the same 2 megs but it doesn't eat minutes, so you are fine with a plan that is 59.99 for 500 mins and 2 megs, it is almost equivalent to the 79.99 tdc plan if you are like me and use about 400 mins a month for data and less than a few hundred for voice.
My awareness flows through the rivers of existence which pulse with the vibrance of my thoughts.