AT&T Inc. , the second-largest U.S. wireless carrier, said it is in talks to start selling Nokia Oyj’s Windows Phone smartphones next year, a boon for the handset maker as it seeks to increase sales in the country.

AT&T Inc. , the second-largest U.S. wireless carrier, said it is in talks to start selling Nokia Oyj’s Windows Phone smartphones next year, a boon for the handset maker as it seeks to increase sales in the country.