AT&T on Tuesday posted first quarter earnings of $0.64 per share on revenues of $31.40 billion, thus matching Wall Street expectations of $0.64 EPS on revenues of $31.75 billion. The carrier posted a net addition of 291,000 subscribers on the quarter, bringing its total subscriber number to 107.3 million. What’s more, the company also reported that its churn rate is down year-over-year-, going from 1.46% in the first quarter of 2012 to 1.38% in Q1 2013. AT&T also reported selling 4.8 million iPhones on the quarter, thus helping the carrier maintain its spot as the top iPhone carrier in the United States. AT&T shares were down by around 1.25% in after hours trading on news of its Q1 earnings.