The following details AT&T Inc.'s acquisitions since its breakup. AT&T's plan to buy T-Mobile USA from Deutsche Telekom AG (DTE) for $39 billion, creating the largest U.S. wireless carrier, caps more than $250 billion of purchases over two decades, according to data compiled by Bloomberg.
1876: Alexander Graham Bell invents the telephone, leading to the formation of the Bell Telephone Company, later becoming the American Telephone & Telegraph Company and then AT&T.
January 1982: AT&T and the U.S. Department of Justice sign a Modification of Final Judgment that ends an antitrust suit and splits the company up.
January 1984: AT&T Corp. is split into seven Regional Bell Operating Companies. These "Baby Bells" later merged or were renamed to form operators including Verizon and Qwest. AT&T held onto the long-distance business and spun off Bells Labs to become Lucent Technologies Inc.
September 1994: AT&T finishes its $11.5 billion acquisition of McCaw Cellular Communications Inc. after the Federal Communications Commission clears the way for the combination of the U.S.'s largest long-distance service provider and the largest cellular operator.