TDS

Founded in 1968, Telephone and Data Systems offers cellular services to postpaid and prepaid customers, including retail consumers, government entities, and small-to-mid-size business customers in industries, such as the construction, retail, agriculture, professional services, and real estate; and national plans with voice, messaging, and data usage options. It also provides wireless devices comprising handsets, tablets, mobile hotspots, home phones, and routers; accessories that include wireless essentials, which comprise cases, screen protectors, chargers, and memory cards, as well as various consumer electronics, such as headphones, smart speakers, wearables, and home automation products. The company is headquartered in Chicago, Illinois.