As of this week, Boston's MBTA subway system now has cell signals underground for AT&T, T-Mobile and Verizon Wireless customers.

"The service is currently being offered in Downtown Crossing, Government Center, State, and Park Street stations, and all the tunnels in between," writes the Boston Globe's Noah Bierman. "Expansion to other stations and tunnels is expected as cellphone service providers see demand and are willing to pay for the connection."

"The MBTA contracted with InSite Wireless to design, build and operate a wireless infrastructure solution that allows multiple licensed cellular providers to deliver wireless voice and data services to T riders," according to Cellular-News. "The system is designed to deliver seamless service coverage from above ground to station platforms, walkways, and the trains traveling between stations."

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