I have a Nokia smartphone. I have T-Mobile. But T-Mobile doesn't sell my phone, so they won't give me a smartphone unlimited data plan and I'm stuck with the much more expensive Total Internet package. But if I log in to T-Mobile's self service site, I can tell them I have any damn phone I like. So if I do that, and tell them I have a Blackberry or a Sidekick, and pick the BB or SK smartphone plans, is there some technical reason it won't just work? Am I in any serious danger of cancellation by violating the TOS or anything else?
I'm about to acquire the object of my gadget lust. I'm new to the GSM world, and am looking for opinions about whether I should take this phone to T-Mobile or Cingular for service. (Other GSM newbie questions inside.) [more inside]