![London Underground to get 4G phone signal in Tube tunnels by mid-2020 – and Mayor Sadiq Khan promises '5G internet' too | The Sun London Underground to get 4G phone signal in Tube tunnels by mid-2020 – and Mayor Sadiq Khan promises '5G internet' too | The Sun](https://www.thesun.co.uk/wp-content/uploads/2019/07/RB-COMPOSITE-TUBE-MAP-4G-1.jpg?strip=all&quality=100&w=1500&h=1000&crop=1)
London Underground to get 4G phone signal in Tube tunnels by mid-2020 – and Mayor Sadiq Khan promises '5G internet' too | The Sun
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