The upgrade means that around 10 per cent of Tube stations with platforms that are below ground, and therefore usually unable to get a mobile signal, are now connected.
Transport for London (TfL) is aiming to bring high-speed mobile coverage to the entire Tube network, as well as the Elizabeth line, by the end of 2024.
TfL has also said that Mornington Crescent station will receive coverage “within the next fortnight”, while coverage within the tunnels between Kentish Town, Camden Town and Mornington Crescent stations will become available “in the coming months”.
All four mobile network operators - Three UK, EE, Vodafone, and Virgin Media O2 (VMO2) - are taking part in the rollout, which has already delivered 4G on the eastern section of the Jubilee line between Westminster and Canning Town, between Archway and Kentish Town on the Northern line and between Holland Park and Queensway on the Central line.
Later this summer, some of central London's busiest Tube stations, including Oxford Circus and Tottenham Court Road, will also get coverage for the first time, along with further stations along the Northern and Central lines.
Sadiq Khan, the Mayor of London, said: “I am delighted to see the promise I made of delivering 4G across the London Underground continuing to progress, with Camden Town joining an ever growing network of lines and stations with full connectivity.
“Growing numbers of underground Tube stations now have 4G services, with many more to come as we continue to invest in London's digital infrastructure. By increasing connectivity across our capital we are helping to build a better, fairer and more prosperous London for everyone.”