Transport for London (TfL) is currently installing a pilot system to provide 4G phone and internet signal on the trains and in the tunnels and stations of its Underground service.
EE has become the third mobile operator in the UK, after O2 and Vodafone, to partner with TfL on the project, which will launch its first phase, on the eastern half of the Underground’s Jubilee Line, in March 2020.
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