Telephone and Data Systems is a telecommunications company that provides wireless, wireline, cable, and hosted and managed services to residential, business, and government customers. They operate through their subsidiaries, including U.S. Cellular, TDS Telecom, and OneNeck IT Solutions, offering a comprehensive range of communication solutions.

In terms of technical analysis, the stock of Telephone and Data Systems (TDS) is currently retesting a key level of resistance. This indicates that the stock's price has reached a significant barrier where selling pressure may outweigh buying interest. The retest of this resistance level suggests that investors should closely monitor the stock's price action and volume patterns to assess whether it can break through this resistance or experience a reversal.

Traders and investors should consider additional technical indicators, such as moving averages, trendlines, and momentum oscillators, to gain further insights into the stock's potential future direction. It is important to exercise caution and wait for confirmation before making any investment decisions.