(Reuters) – AT&T Inc reported a better-than-expected quarterly profit as the second-largest U.S. wireless carrier added both postpaid and prepaid customers. AT&T’s shares were up 2.4 percent at $34.75 in extended trading on Thursday. The company said prepaid net additions were 331,000 in the second quarter, while analysts polled by market research firm FactSet StreetAccount expected the company to lose 27,000 customers.