AT&T has filed a lawsuit against the National Advertising Division $(NAD)$, seeking a court declaration affirming its right to make truthful statements about T-Mobile's advertising practices. The move comes after NAD called on AT&T to remove messaging highlighting that, over the past four years, T-Mobile has been asked to correct its advertising at least 16 times for being false, misleading, or unsubstantiated. AT&T's new campaign, "Ain't Our First Rodeo," emphasizes its commitment to transparency and aims to ensure that consumers are fully informed about competitors' marketing claims. The lawsuit underscores AT&T's position that customers deserve honesty in advertising, even if it puts industry rivals under scrutiny.