Exhibit 23 

Form 11-K for 2019 

File No. 1-8610 

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement (Form S-8, No. 333-189789) of our report dated

June 29, 2020, relating to the statements of net assets available for benefits as of December 31, 2019 and 2018, the statement of

changes in net assets available for benefits for the year ended December 31, 2019, and the supplemental schedule of assets (held at end

of year) as of December 31, 2019, of the BellSouth Savings and Security Plan, which appears in this Annual Report on Form 11-K of

the BellSouth Savings and Security Plan for the year ended December 31, 2019. 

/s/ BKD, LLP 

San Antonio, Texas 

June 29, 2020