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![](https://cdn.abcotvs.com/dip/images/14912209_060424-wls-at-t-issues-resolved-10pvo-vid.jpg?w=660&r=16%3A9)
AT&T says 'interoperability issue' affecting calls has been resolved
AT&T has resolved the "interoperability issue between carriers" customers were experiencing on Tuesday, the company said in a statement.
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