Anyone know whether there are mobile tariff providers which actually work well in the City Of London (Liverpool Street, St Mary Axe, etc)?

I'm on talk mobile and both times I was in the city this week the data service was effectively non-responding until the train home carried me a few zones out.

Sounds like this is a well known problem in London:

https://www.bbc.co.uk/news/articles/c5y594lzyjvo

but does any provider do a significantly better job than others in this part of the city?

#London #MobileData #TalkMobile