Jeff McElfresh, CEO of AT&T Communications, the consumer connectivity arm of AT&T (NYSE:T), is challenging those who say AT&T is the third wireless provider in the U.S., behind Verizon (NYSE:VZ) and T-Mobile (NASDAQ:TMUS), in profitability, popularity and performance. Subscriber churn, a measure of the percentage of subscribers who switch providers, was the lowest in the […]