UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-14157 TELEPHONE AND DATA SYSTEMS, INC. (Exact name of Registrant as specified in its charter) (State or other jurisdiction of in ...

Exhibit 99.1 NEWS RELEASE As previously announced, TDS will hold a teleconference on May 3, 2024, at 9:00 a.m. CDT. Listen to the call live via the Events & Presentations page of investors.tdsinc.com. TDS reports first quarter 2024 results 2024 guidance reaffirmed CHICAGO (May 3, 2024) — Telephone and Data Systems, Inc. (NYSE:TDS) reported total operating revenues of $1,262 million for the first quarter of 2024, versus $1,303 million for the same period one year ago. Net income (loss) attributable to TDS co ...

*uscellular. 2This presentation contains certain non-GAAP financial measures. Information about these non-GAAP financial measures and reconciliations between each non-GAAP financial measure and the most directly comparable GAAP measure are contained in the appendix to this presentation. Supporting our business units as they make key investments *uscellular. Cost optimization program remains strong; Adjusted EBITDA grew 3% Network modernization completed; focusing on multi-year mid-band deployment going forw ...

Telephone and Data Systems, Inc. (NYSE:TDS) Q4 2023 Earnings Conference Call February 16, 2024 10:00 AM ET Company Participants Colleen Thompson - VP, Corporate Relations Vicki Villacrez - EVP & CFO Laurent Therivel - President, CEO & Director Douglas Chambers - EVP, CFO and Treasurer Michelle Brukwicki - CFO, TDS Telecommunications LLC Conference Call Participants Richard Prentiss - Raymond James Simon Flannery - Morgan Stanley Michael Rollins - Citigroup Sergey Dluzhevskiy - GAMCO Investors Operator Good ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-14157 TELEPHONE AND DATA SYSTEMS, INC. (Exact name of Registrant as specified in its charter) (State or other jurisdiction of incorpo ...

Telephone and Data Systems, Inc. (NYSE:TDS) Q3 2023 Earnings Conference Call November 3, 2023 10:00 AM ET Company Participants Colleen Thompson - VP, Corporate Relations Vicki Villacrez - SVP, Finance & CFO, TDS Telecommunications Corporation Laurent Therivel - President, CEO & Director Douglas Chambers - EVP, CFO and Treasurer Michelle Brukwicki - CFO, TDS Telecommunications LLC Conference Call Participants Richard Prentiss - Raymond James & Associates Philip Cusick - JPMorgan Chase & Co. Simon Flannery - ...

23 *uscellular. Reform Act of 1995 Corporate Update ◦ UScellular - deploying 5G mid-band spectrum ◦ Renewed USM EIP securitization for an additional 2 years ◦ TDS entered into a $300 million senior secured term loan 3 *uscellular. Postpaid ARPU grew 2% Executing on Growth Initiatives (Fixed Wireless Access & Towers) 5 44 49 4442 44 107 10593 83 84 3Q'22 4Q'22 1Q'23 2Q'23 3Q'23 Fixed Wireless Subscribers (K) 3Q'22 4Q'22 1Q'23 2Q'23 3Q'23 Handsets Connected devices 1.15% 1.12%1.06% 1.01%1.11% 1.27%1.21% 1.30% ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-14157 TELEPHONE AND DATA SYSTEMS, INC. (Exact name of Registrant as specified in its charter) (State or other jurisdiction o ...

Telephone and Data Systems, Inc. (NYSE:TDS) Q2 2023 Earnings Conference Call August 4, 2023 10:00 AM ET Company Participants Colleen Thompson - VP, Corporate Relations Vicki Villacrez - SVP, Finance & CFO, TDS Telecommunications Corporation Laurent Therivel - President, CEO & Director Eric Jagher - SVP & CMO Austin Summerford - Chief, Strategy Partnerships and Towers Douglas Chambers - EVP, CFO, Treasurer & Director Michelle Brukwicki - CFO, TDS Telecommunications LLC Michael Irizarry - EVP, CTO, Head, Engi ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q For the quarterly period ended June 30, 2023 TELEPHONE AND DATA SYSTEMS, INC. (Exact name of Registrant as specified in its charter) OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-14157 (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (State or other jurisdiction of inc ...