Free Wi-Fi will be available at 30 Washington Metrorail stations by the end of this year, the transit agency announced Wednesday, while cellphone service is now available along a portion of the Red Line.

Six stations already have public Wi-Fi: Metro Center, Gallery Place, L’Enfant Plaza, Judiciary Square and Archives. The other 24 will be equipped by the end of this year, with the goal of having Wi-Fi installed at all underground stations by mid-2018.

{mosads}The transit agency also announced Wednesday that wireless voice and data service has been activated on the Red Line between Glenmont and Silver Spring, allowing passengers uninterrupted service.

There is already existing cell service at all Metro stations so customers can make calls, text and browse the web.

When Metro installs a new radio system for trains and emergency responders in its tunnels, it will also be adding special cable in order to support wireless service.

“Customers have told us that they want the ability to stay connected while on Metro, and we are pleased to have worked with the wireless carriers to deliver this service,” said Metro general manager Paul J. Wiedefeld. “I look forward to announcing the activation of additional tunnel segments in the months ahead.”