Telephone companies are businesses that provide communication services, primarily through landline and mobile phone networks. They enable people to make voice calls, send text messages, and access the internet. These companies invest in infrastructure, such as cell towers and fiber optic cables, to ensure reliable service for their customers. In addition to traditional voice services, many telephone companies offer bundled packages that include internet and television services. They compete in the market by providing various plans and pricing options to meet the needs of different consumers. Major players in the industry include Verizon, AT&T, and T-Mobile.