During an televised interview with CNBC, AT&T CEO Randall Stephenson said Tuesday that his company’s efforts to repair its voice network have been paying off and that call quality is steadily improving. “We’ve been going hard at the voice quality issue,” Stephenson said, adding that AT&T’s network revamp, one which primarily focuses on particularly troublesome major cities such as San Francisco and New York, is nearly complete. Stephenson said AT&T customers can expect to use their phones as a phone by the end of the summer. Okay, that last bit was a joke. Sort of.