Some phones you can and some phones you can't, you need to ask the company if the particular phone is compatable with their service. As for the PDA internet service, it depends on your service, some people get it for free but some have to pay extra monthly.
yeah i will look around i work at a cellphone shop so im ask my guy Jay because he does verizon/cingular and i do sprint/nextel so let me ask him and i will get back to you