Why is there no Wi-Fi on the Tube?
Why is there no Wi-Fi on the Tube? London's Tube tunnels twist and turn, so any Wi-Fi radio waves would not be able to penetrate walls or go around corners.
Is there 4G in the underground?
Currently around 10% underground tube stations have 4G and 5G mobile coverage. The first Tubes stations in London's West End have received high-speed mobile coverage. 4G and 5G is available at Oxford Circus and Tottenham Court Road ticket halls and on the Central line between the stations.