AT&T says it has completed a project to improve wireless service in New York City, where the proliferation of iPhones has caused dropped calls, slow downloads and other problems.
The phone company said Monday that it has improved its "3G" network, used by the iPhone and some other phones, by giving it more room on the airwaves in the boroughs of Manhattan, Bronx, Brooklyn and Queens.
AT&T Inc. said in February that upgrading its wireless network, particularly in New York and San Francisco, was a top priority. It has said it was adding billions to this year's capital budget to do so.
AT&T says a similar upgrade of San Francisco's network is still ongoing.