Apparent block on mass-unlocking of AT&T iPhones hits resale industry

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Companies that specialise in buying and selling used iPhones are reporting that the methods they use to unlock handsets to allow them to be used on any compatible network are no longer working for AT&T models.

AT&T models are in greatest demand for companies reselling iPhones overseas, as the frequencies used are compatible with many foreign networks. But the WSJ says that something changed early in October, and no solution has been found since then. One reseller, run by Louis Ashner, says it is being forced to close.

“The market is gone,” Mr. Ashner said, who said he was on track for $1 million in revenue this year. “We are closing up.”

Business owners throughout the U.S. used-smartphone market are reporting the same problem, and like Mr. Ashner none of them knows exactly what went wrong. Whatever changed, AT&T appears to be at the center of it …  Read more