For years ,in one of the deepest undergrounds in the world (not puny Tube like in London) reception was excellent in Moscow. Some escalators are never ending and whilst you get down there ,the reception is always there and is clear.
For the love god ,grow up TFL ,O2 and whoever and move in to the 21st century ,oh wait its brand new high-tech stuff isn't it???

Hong Kong has had mobile services working in every tunnel we have for at least 12 years, probably longer. Also, our trains don't run right next to each other cause we like retaining function of our ears.

It's almost a good idea, except the trains are so loud. Well at least the tube is so loud you could sing to a song on your iponce and no one could hear you.

In the tunnels, no one can hear you scream...."You can put the dinner on, I'll be home in 20 minutes...hubby.".

For quite a long time now, the San Francisco BART stations have had underground reception. It may seem like a novelty at first with many people taking advantage of it, but after it's been in for a while, it won't be any different than the dozens of people talking on their phones on the sidewalks.

Sorry, but... in Lisbon, Portugal, we have 3g gsm service in all lenght of our subway, for 4 years... is it possible that only now you have it in Glasgow?