"All these contract and device deals are almost irrelevant because people will go to the next deal or the carrier will buy you out," Entner said. "There won't be a financial problem for the carrier."
Also, Entner questioned how many iPhone 6 customers are that interested in trading up to an iPhone 6S to make the deal enticing. "There's only a limited number of those iPhone 6 users, so the impact is not really that dramatic, even though the marketing visuals are quite stark. People might think, '$1 a month for an iPhone 6S -- oh yes!'"
After 18 months, T-Mobile will let a customer buy an iPhone for $125 less than full retail price, or $524. Or, T-Mobile has a deal to allow an iPhone 6 trade-in and pay just $254 for the iPhone 6S 16 GB after 18 months. At Sprint, a customer can purchase the device after 21 months, owing $187, or can keep the device and the rate will revert to $22 a months.
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