Craving the new iPhone 3GS? Apple’s newest baby will be faster than ever and offer yet more functionality. If you are already an iPhone 3G devotee, the upgrade will likely cost you $399. If you’ve been cannily waiting in the wings for the last few years — expecting that Apple would continue to upgrade its mobile device while dropping the price — it will cost you a mere $199 or $299, depending on the version you choose. That is, of course, if you opt for a two-year service contract with AT&T. Without it, get ready to plunk down an additional $400.
