[Vibrant General] BruceElliott:
Yes, that is what "unlimited" means. You got the adjective right but I believe that you may be misunderstanding the noun. "Unlimited" must modify something; it cannot be analyzed by itself. if you read the fine print you will see that TMO promises unlimited Internet access, not unlimited Internet access at any particular speed. Thus (they claim), they continue to supply "unlimited" Internet access at 56kb after switching on the cap. That is, you may download any amount of data possible at 56kb. They may not even promise that. They may simply talk in terms of an "unlimited plan," which is marketing sizzle that means essentially nothing, except perhaps suggesting an absence of up-charges.

It seems that you may be suggesting that TMO promises unlimited access at any speed. That would not make sense, of course, because they are not physically capable of providing "any speed." So, what bandwidth are you buying when you sign up with a carrier? Well, essentially you are buying into an uncertain, imaginary bandwidth. By that I mean that in your own mind you imagine/hope what the bandwidth will be like, based upon that carrier's generally-stated advertising, PR releases, reputation, etc. At the current state of the wireless art, a carrier will not promise a retail customer any particular bandwidth.

That is where the "trick" lies and how unpleasant surprises arise. The carriers speak out of two sides of their mouth. One side is the advertising, PR, press releases, etc. which suggest certain bandwidth availability by making references to services (movie downloads, Internet TV, etc.) that require such bandwidth availability. The other side of their mouths is the retail subscriber contract terms which suggest just the opposite. That is, regular use of the bandwidths suggested in the PR constitutes punishable abuse.

These are untenable, contradictory positions that will likely not persist for much longer (JMO). Unfortunately, the short-term "fix" could be a metering scheme that is even worse. If they take that route, though, their ad campaign might take a big hit, as they would likely have to abandon terms like "unlimited."

It may be helpful to keep in mind what the wireless carrier business really is. A carrier spends billions of dollars to purchase spectral bandwidth from the US government. That carrier then spends additional billions of dollars to build out a network which enables them to repackage the spectral bandwidth as voice/data bandwidth to sell at retail. Like any other business, a wireless carrier will attempt to sell its service (repackaged bandwidth) for as high a price as the market will allow. Understanding this is the key to understanding why a carrier will laugh all the way to the bank when a fixed price, high-bandwidth customer threatens to cancel their contract and/or take their business elsewhere. If that happens, the carrier will simply resell that bandwidth to two or more new customers who may be smaller bandwidth consumers. Following such a transaction, the carrier will have replaced $80 per month of revenue with $160 $240 or more of monthly revenue.

Please note that my writings in this or any other XDA threads are simply personal opinions relating to public matters and are specifically not intended as statements of fact or advice. Any references to particular carriers are intended as examples only and could be applicable to any carrier.