The Stockholm subway has had 4G since 2015, but that was replacing the 2G/3G networks.
It would be interesting to know how it works. Are there a lot of smaller base stations? Is there a station on each train that bridges traffic using some other technology that works better underground?
https://computersweden-idg-se.translate.goog/2.2683/1.611884...
(It's nothing to do with bombs.)
It would have been much much more impressive if it was the Central line.
I'd assume the project to install 4G/5G on the Elizabeth line just overran, or would have delayed opening the railway. The wording in [1] isn't completely clear, but suggests this was supposed to happen in 2022.
[1] https://www.standard.co.uk/news/london/london-tube-undergrou...
They've been talking about this for decades as far as I can remember. They always resisted it because they were worried someone would use it to set off a bomb (London has quite a lot of terrorism in it's semi-recent history). I guess now they realised that suicide bombers are probably more likely than a Nokia 3310 rigged up to a detonator.
There's some explanation here — power, space, time and cost were all issues: https://www.londonreconnections.com/2023/deep-inside-bringin...
The wifi is available if you have a British SIM from a major network, there are also locals who can't use it.
Not really. The wifi was funded by the cellular/broadband networks as a value-add for their customers. So I was a broadband Virgin customer and could use Virgin Wifi on the Tube