Wifi connection on London Underground

[Markk]

Hi. I have recently been transferred from Virgin Media to O2. I now have an O2 sim in my One+ 8T Android phone but cannot connect to o2 on the London Underground.

Any suggestions, please? Four of your stores have so far been unable to solve this.

[Markk]

Thank you @madasaf1sh for your reply and the link to how to cancel a contract with O2.

'You dont need to enter any text as it uses you sim card to authenticate..' - except that this is what is NOT happening on my phone.

[madasaf1sh]

What is it asking for?? As that is something you haven't said @Markk 

[pgn]

This help, @Markk? 

https://www.railadvent.co.uk/2023/09/4g-and-5g-rolled-out-to-more-of-londons-tube-network.html