Transport for London (TfL) has pledged that the entire tube network will have 4G connectivity by the mid 2020s.
"The London Underground network is an incredibly challenging environment in which to deliver technological improvements, but we are now well on the path to delivering mobile connectivity within our stations and tunnels," said Shashi Verma, TfL chief technology officer.
"We have begun the complex work to allow our customers to be able to get phone reception within our tunnels from March 2020, with more stations and lines coming online during the coming years."
4G will be going live for Jubilee Line passengers first, with the trail area running between Westminster and Canning Town - although London Bridge and Waterloo stations aren't being included - and the eastern part of the line will get coverage by March 2020. So this isn't going to be happening for a long while.
"This is a really important step for the millions of people who use the Tube each year," said London mayor, Sadiq Khan. "Introducing 4G and, in the future, 5G will help Londoners and visitors keep in touch and get the latest travel information while on the go.
"London is the best place to live, visit and work - and projects like this will help make it even better." [Evening Standard]
Update: This article has been amended to reflect the correct 'London Underground full 4G coverage' date of mid 2020s, rather than mid 2020. Which I think we can all admit, is an easy mistake to make on a Friday afternoon.
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