Speaking at the Deutsche Bank Media, Technology & Telecom Conference in Palm Beach, Fla., on Wednesday, AT&T (NYSE: T) CFO John Stephens said he expects his company to add only about 400,000 postpaid customers in the first quarter. That would be a weaker performance than in Q1 of 2014 and below analysts' expectations, but the carrier also expects to see its postpaid churn improve. Financial analysts predicted that the company's improved churn figures would be offset by weaker wireless margins. In a filing with the Securities and Exchange Commission yesterday, AT&T disclosed its first-quarter expectations of 400,000 postpaid customers. In the first quarter of 2014, AT&T notched 625,000 postpaid net additions. FierceWireless has a complete summary of Stephens' Deutsche Bank talk here.