Competing fiber internet service providers Verizon and Frontier announced Thursday that the two have entered a definitive agreement in which Verizon will acquire Frontier Communications. The all-cash transaction, expected to close in approximately 18 months pending regulatory and Frontier shareholder approval, is valued at $20 billion. Post-close, Verizon's fiber reach and subscriber base will increase significantly. Frontier Fiber currently boasts approximately 2.2 million subscribers from 7.2 million loca ...