NEW YORK (CNN/Money) - AT&T Wireless posted a narrower-than-expected first-quarter loss Tuesday that beat Wall Street expectations as the company logged higher sales.

For the quarter ended March 31, the mobile phone service provider reported an operating loss of $16 million, or a penny a share, narrower than the loss of $56 million, or 2 cents a share, a year earlier. Analysts polled by earnings tracker First Call expected a loss of 3 cents a share.

First-quarter revenue jumped 14.6 percent to $3.4 billion from $3 billion.

Shares of AT&T Wireless (AWE: Research, Estimates) slipped 70 cents to $8.10 Monday.