AT&T Wireless

(AWE)

reported today that its revenue and subscriber base grew more rapidly than expected, although sales per customer dropped.

First-quarter revenue for the no. 3 U.S. wireless telephone company increased 46.2% to $3.21 billion, higher than the $3.17 estimate on

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. The company said it added 585,000 new customers in the quarter ending March 31, an increase of 40% over the previous quarter and higher than analysts' estimates of about 530,000. Its subscriber base is now 15.7 million, 17.9 million including partnerships and affiliates.

But average revenue per customer dipped 7.4% to $62.60, which the company said was due to competitive pressure, among other reasons.