Verizon to buy Frontier in $20 bln deal to boost fiber network in U.S. ReutersVerizon to acquire Frontier VerizonVerizon to acquire Frontier in $20 billion deal to boost fiber network CNNFrontier Stock Tumbles as Verizon Announces $20B All-Cash Acquisition Yahoo FinanceVerizon Acquiring Rival Frontier Communications In $20 Billion Cash Deal Deadline