Each autumn, the arrival of a new iPhone becomes less a product launch than a ritual of competitive positioning, as America's largest wireless carriers race to convert consumer desire into long-term loyalty. This September, Verizon, AT&T, T-Mobile, and Comcast have each entered the field with trade-in credits and bundled offers reaching up to $1,300, vying for the attention of customers drawn to Apple's iPhone 18 Pro lineup and the newly unveiled foldable iPhone Duo. Beneath the promotional noise lies a quieter signal: the wireless industry is slowly unbundling its services, as T-Mobile's new