Telephone and Data Systems, Inc., a telecommunications company, provides communications services in the United States.

It operates through two segments: UScellular and TDS Telecom. The company offers wireless solutions to consumers, and business and government customers, including a suite of connected Internet of things (IoT) solutions, and software applications for monitor and control, business automation/operations, communication, fleet and asset management, smart water solutions, private cellular networks and custom, and end-to-end IoT solutions; wireless priority services and quality priority and preemption options; smartphones and other handsets, tablets, wearables, mobile hotspots, fixed wireless home internet, and IoT devices; and accessories, such as cases, screen protectors, chargers, and memory cards, as well as consumer electronics, including audio, home automation and networking products.

It also provides replace and repair services; Trade-In program through which it buys customers' used equipment; internet connections and all-home WI-FI services; TDS TV+, an integrated cloud television platform that offers video content and features; local and long-distance telephone service, voice over internet protocol, and enhanced services; and broadband, IP-based services, and hosted voice and video collaboration services.

The company sells its products through retail sales, direct and indirect sales, third-party retailers, and independent agents, as well as through ecommerce and telesales.

Telephone and Data Systems, Inc. was incorporated in 1968 and is headquartered in Chicago, Illinois.