Ohh!! dear Lance your doing it again!! making outragous statements, which are non sense & based on utter ignorance.
You should check your facts Lance!! I used to work in the computer industry for many years I have had to deal with BT professionally, as well as being an ordinary domestic phone customer. Yes! indeed BT are very paradoxical, BT are dreadfully slow to communicate with real customers at times thats true. But BT do provide 95% of ALL the UK's telecoms infrastructure, including most of our internet access & have done so for many many years because they have managed to maintain a market monoploy for over 30yrs now.
YES! indeed I know about VOIP I have looked into this technology in some detail, I do think it has its uses for some people in the wider scheme of things.
Lance your just plain wrong mate, Zen as an ISP "ARE" a BT customer themselves & use BT central fat pipes 622Meg for connecting you to the wider internet. Please check your facts before you make such sweeping statements!!
Ivan