Frontier began overseeing the service of 3.3 million landline phones, 2.1 million broadband Internet connections and 1.2 million FiOS video service connections in California, Texas and Florida in April, according to a release sent out by the company. These accounts were acquired by Connecticut-based Frontier in a $9.9 billion deal with Verizon last year, in which Frontier also assumed $600 million of Verizon debt.