A value-added service (VAS) is a popular telecommunications industry term for non-core services, or in short, all services beyond standard '''voice call'''s and '''fax''' transmissions. However, it can be used in any service industry, for services available at little or no cost, to promote their primary business. In the telecommunications industry, on a conceptual level, value-added services add value to the standard service offering, spurring the subscriber to use their phone more and allowing the operator to drive up their ARPU. For mobile phones, technologies like SMS, MMS and data access were historically usually considered value-added services, but in recent years SMS, MMS and data access have more and more become core services, and VAS therefore has begun to exclude those services.