sentence1: AT&T, the largest telecommunications company in the United States, reported on Wednesday that its first-quarter profit dipped 9.7 percent from a year ago, but cost-cutting and new customers lured by the iPhone helped beat Wall Street's expectation of a bigger drop. The company, based in Dallas, reported its net income for the quarter was $3.1 billion, or 53 cents a share, compared with $3.5 billion, or 57 cents a share, in the period a year ago. AT&T said revenue was $30.6 billion, slightly down from $30.7 billion in the quarter a year ago. Analysts had expected revenue of $31.1 billion.
sentence2: iPhone is a product of Apple's.