4, 5(a)(2), or 6 of the Federal Trade Commission Act ( 15 U.S.C. 44 , 45(a)(2), 46), or any jurisdictional limitation of the Commission, the Commission shall also enforce this Act and the regulations promulgated under this Act, in the same manner provided in subparagraph (A), with respect to— (i) common carriers subject to the Communications Act of 1934 ( 47 U.S.C. 151 et seq. ) and Acts amendatory thereof and supplementary thereto