I'm sorry, but this doesn't seem to be any different than a smartphone or any other cell phone. I keep reading online that a PDA is more expensive for the unit itself, but less expensive in the long run because the smartphone requires a monthly voice and data plan. What I'm getting from your answer is that a PDA requires the same. So, if this is true, then the PDA would be more in the long run, because you pay more for the unit and ALSO pay monthly voice/data charges.

Does this make sense what I'm asking?

Thanks again,
Corrinna