U.S. wireless carrier Verizon Communications Inc. (VZ) has agreed to buy the largest pure-play fiber Internet provider in the country, Frontier Communications (FYBR) , in an all-cash deal valued at $20 billion to boost its fiber network. Investors seeking to tap the opportunity arising from the projected deal could bet on telecommunication ETFs like Communication Services Select Sector SPDR Fund (XLC) , Fidelity MSCI Communication Services Index ETF (FCOM) , Vanguard Communication Services ETF (VOX) , iShar ...