Telephone and Data Systems (TDS) is a telecommunications company headquartered in Chicago, United States. Established in 1969, the company has a rich history spanning over five decades in the industry. TDS provides a wide range of products and services, including wireless, wireline, cable, broadband, and hosted and managed services.

Through its subsidiary, U. S. Cellular, TDS offers wireless communication services to both consumer and business customers in the United States.

The company also provides wireline services, including voice, video, and data communications solutions, to residential and commercial customers through its subsidiary, TDS Telecom. On a global scale, TDS operates primarily in the United States. However, it has undertaken several notable partnerships and joint ventures over the years.

One of the most significant joint ventures is with Sprint Corporation, resulting in the formation of United States Cellular Corporation (USCellular). This joint venture helps TDS expand its wireless network coverage across multiple states. As of the latest available information, TDS has a strong market position in the United States.

It is the seventh-largest wireless provider in the country through its subsidiary, U. S. Cellular.

In terms of global sales, TDS primarily focuses on the domestic market. Throughout its history, TDS has experienced major events and achievements. In 2013, it acquired Baja Broadband Holdings, a cable company, expanding its service offerings and market reach.

TDS has also undergone various changes in its brand's strategy and product lineup to adapt to evolving customer needs and industry trends. Currently, TDS continues to operate as a leading telecommunications company in the United States. The latest key information includes its pursuit of expanding wireless coverage and introducing new technologies to enhance customer experiences.

In conclusion, Telephone and Data Systems is a well-established telecommunications company with a strong presence in the United States. Through its subsidiaries, it offers a range of telecommunications products and services. While its operations are primarily focused domestically, TDS has undertaken joint ventures and partnerships to expand its services and market reach.

With a history of achievements and ongoing advancements, TDS remains a significant player in the telecommunications industry