The iPhone 3GS will continue to be available this September, but will be free on a carrier contract, argues RBC Capital analyst Mike Abramsky. "While a $49 iPhone is already available (AT&T), psychologically a $0 iPhone provides a compelling offer," he writes. The same device might be $399 unsubsidized. The iPhone 4 is predicted to drop to a $99 standard price, which would follow Apple's normal policy regarding last-generation iPhones.