Verizon has signed on for more coverage in the New York City Subway as Transit Wireless continues its planned deployment through 2017.

Transit Wireless LLC is deploying distributed antennas and WiFi hotspots in the subway. It aims to wire all 279 underground MTA stations by 2017. (See Transit Wireless: Unwiring the NYC Subway.)

All of the big four US mobile carriers -- AT&T Inc. (NYSE: T), Sprint Corp. (NYSE: S), T-Mobile US Inc. and Verizon Wireless -- have deals for coverage in the subway from Transit Wireless. Verizon has now signed on to support phase four and five of the buildout of the project. The carrier currently has service in 62 stations. (See NYC Subway Wireless No Cure for Ebola Fears.)

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Phase four of the job started in March 2015. It will connect 37 stations in Manhattan and the Bronx. Phase five will cover 37 stations in downtown Manhattan. It is expected to start later this year.

After that, Transit Wireless is expecting to move into NYC's largest borough, Brooklyn, to deploy stations there.

For every 60 or so stations that the DAS deployer gets set up, it needs another basestation hotel to house the carrier equipment that supports the service. It current has these hotels in Manhattan, Queens and the Bronx.

— Dan Jones, Mobile Editor, Light Reading