Every living thing knows about iPhone. Apple and AT&T saw to that in their unprecedented campaign to prime demand for a mobile device that has been dubbed "revolutionary" and "game changing." After nine days doing nothing but living, breathing, and dissecting a 4GB iPhone, I am captivated by it. I'd challenge any gadget hound to find a more satisfying, status-elevating way to blow half a grand.

The Bottom Line Apple iPhone Apple, http://apple.com AT&T, att.com Fair  4.9 criteria score weight Messaging 4 20% User interface 7 20% Extensibility 1 15% Voice capabilities 5 15% Application support 5 10% Multimedia 7 10% Value 6 10% Cost: $499 for 4GB Flash memory; $599 for 8GB flash memory; requires $36 activation fee plus 2 years of AT&T wireless service at $59.99, $79.99 or $99.99 per month; other options may be available to current AT&T subscribers Platforms: Apple iTunes (free download) on Mac or Windows PC; AT&T Wireless coverage with 2-year contract; Apple ID (free registration) Bottom Line: Consumers looking for a gadget fix and who don’t mind paying $60/month for it will be delighted by the iPhone, which is effectively a heavenly widescreen, Wi-Fi iPod with PDA and browser functionality. But for professionals, once you get your feet off your desk and get down to business, excitement gives way to deep disappointment. iPhone is trounced in professional features, including 3G, VOIP, push to talk, IM, voice dialing, and much more, by all comers within $200 of its price range. And because it's a closed platform in the iPod tradition, these absent features can't be added by creative third parties. Apple and AT&T ruined iPhone for the professional handset market. About our Reviews and Scoring Methodology

iPhone is good enough as a phone, a PDA, a media player, and a mobile browser to hit the sweet spot of those consumers who can afford the device, along with activation and monthly service fees. So, I say it again: If it's a gadget you're after, you're looking at a $499 wide-screen iPod with oodles of extras. If that's the perspective you bring to your consideration of iPhone, you have the right one. Declare yourself an early birthday.

[See also: iPhone delivers more misses than hits | Special report: iPhone: The revolution is here ]

Now it's time for consumers and gadget freaks to tune out because the rest of this review is aimed at those who rely on mobile devices as their lifeline to customers, clients, patients, management, team members, field staff, or hosted data and services. If that's you, understand that I know you came here because you want an iPhone. Apple went to great lengths to tick the feature table boxes that make the device look like everything a professional could want in a mobile device: cell phone, PDA, e-mail, Internet client, and media player.

iPhone fulfills the media player role well — although surprisingly not as well in some regards as a less costly iPod and not leagues better than a smartphone. It fulfills its secondary role, PDA, about as well as a BlackBerry. For phone, mobile messaging, and Internet access, iPhone will get you worked up but let you down once you get to needing it.

The unhappy fact is that for all the glamorous marketing and positioning, iPhone turns out to be the worst $1,975 investment (iPhone plus two years minimum, mandatory service) you could make in mobile communications. If you put that kind of money into a BlackBerry, Treo, Windows Mobile, or Symbian device, you will be blown away by what a genuine professional mobile handset can do for you, out of the box, through incremental improvement by the manufacturer and wireless operator, and extension by downloadable third-party software.

If the iPhone circus opened your eyes to the possibilities offered by high-end mobile devices, that's a good thing. Read this review, realize that what iPhone does is done well by other devices, too, and understand that iPhone's limitations with regard to professional use aren't present in competing devices, even those sold by AT&T.

Funny business
iPhone might be the perfect mobile device if it weren't for a certain pair of CEOs. iPhone users are forced to buy into an extremely narrow range of overpriced rate plans (with no option for a data-only plan), a mandatory two-year contract term, slow EDGE wireless data service, no device discount, and no handset protection. They built the only smartphone that does not function, not even as a calculator, until the buyer pays a $36 activation fee and signs up for a two-year service commitment at a minimum cost of $59.99 per month, plus the usual small-print charges.