This might be the case according to Metro North spokesman Dan Brucker. According to Mr. Brucker, the agency is considering wiring the underground tunnel which stretches from Grand Central to Park Ave. & 97th St. The stretch of tunnel already has service courtesy of AT&T. However the agency is looking into proposals where a carrier would serve as a host for other carriers.
AT&T service works in the underground tunnel stretch due to the fact it once powered telephone booths that were aboard trains. The booths were removed as people started to use cell phones instead of the expensive phone booth service. The booths were removed but the underground wiring remained.
I say the more the merrier as I’m not of the belief that people should not use phones aboard trains. Trains are not resting places but a form of active & noise filled transportation.