2025: HELLO? WHAT? I CAN'T HEAR YOU, I'M ON THE TUBE. FULL 4G NOW. NAH, IT'S CRAP

Transport for London missed the train for 2019 deadline

Transport for London is to trial 4G services on the eastern half of the Jubilee line, and is looking to work with a firm that wants to run a Underground-wide network by the mid-2020s.…

via The Register - Data Centre: Networks
http://go.theregister.com/feed/www.theregister.co.uk/2019/07/19/underground_4g_by_mid_2020s/