The ultra-low-cost airline, Frontier, recently took yet another step to reduce costs: eliminating its toll-free number for customers. It’s something that other low cost airlines — Spirit and Allegiance — have also done.

Frontier says the move will save it about $1.9 million dollars a year, savings it can then pass along to customers. And the airline’s spokesperson, Jim Faulkner, says that they’ve found most of their customers are using cell phones now, often with free long-distance plans, rendering the toll-free number less important.

Here & Now’s Jeremy Hobson talks to Stephanie Brooks, director of marketing for the Daniels College of Business at the University of Denver, about whether toll-free numbers are becoming less relevant in an increasingly mobile world.