AT&T Inc.'s (T) wireless business again posted strong gains in the third quarter, but businesses and consumers alike continue to shun fixed-line phone services.

The Dallas telecommunications giant benefited from the first full quarter of sales of Apple Inc.'s (AAPL) iPhone 3GS as new customers and existing subscribers snapped up the smart phone. But the weak job market and the increasing move to wireless or cable-powered phone option meant a weaker traditional phone offering with no change in sight.

"Wireline voice continues to be a problem for the company," said Todd Rosenbluth, equity analyst at Standard