Verizon added more than 1.4 million subscribers and saw growth in tablets and smartphones, McAdam told CNBC's Kayla Tausche. The company "delivered margins that were consistent with what [it has] done over the last several quarters," he said.
"Second quarter is very strong for us, and I think it's an indication that the industry is very strong," McAdam said.
He added that the company has seen "huge investment." Verizon reports its full second-quarter earnings on July 22.
—By CNBC.com staff