Seems like this era might be coming to an end.

Speaking at an investor conference in New York City on Tuesday, AT&T CEO Randall Stephenson said that with smartphone penetration at over 75 percent and soon reaching 90 percent, wireless operators need to work harder to get customers to use more of the network rather than simply getting on the network.

“When you’re growing the business initially, you have to do aggressive device subsidies to get people on the network,” he said. “But as you approach 90 percent penetration, you move into maintenance mode. That means more device upgrades. And the model has to change. You can’t afford to subsidize devices like that.”

AT&T is now offering $15 a month as an incentive to keep your older phone.

Stephenson also acknowledged that breaking customers of their habit of upgrading to a new phone every 18 months to two years is not an easy task. But he said a business models focused on financing rather than providing a subsidy would be “transformative” for the industry. He said the company’s new AT&T Next program, which offers no-money down and 0-percent financing, drives smartphone penetration in a way that is more sustainable over time.

“If you are a customer and you don’t need to upgrade your device, you can get unlimited talk and text and access to the data network for $45 all-in,” he said. “You can use your own device or finance it. I think this will be very powerful. It’s where we see the market going.”

Fascinating article.