AT&T’s (T: 26.26, 1.01, 4%) earnings were down from a year ago, but the biggest U.S. telecom carrier still beat Wall Street’s estimates for the first quarter. It’s shares were up over 3% in midday trading Wednesday. AT&T reported profits of $3.1 billion, or 53 cents per share, in the first three months of 2009, down about 10% from $3.5 billion, or 57 cents per share, a year ea...