Hmmm, I was told that AT&T will charge you 30USD for having data on your phone, even if your phone doesn't support 3G. They said that N900 is the smartphone and smartphones plan is 30 USD irrespective of whether your phone supports 3G or not. I asked how will they know that I am using the 15$( Quote me If I am wrong) 2G/2.5G plan on the N900 (smartphone) instead of the ATT cellphone( Free Phone which came with contract), then the agent told me that they can find out which phone their customers use and will accordingly charge 30USD instead of 15USD.

Any thoughts? Some of you seem to be using the 2.5g plan on N900, If I am not wrong.