Three

seem fine to me

Slightly confused here with some reviews, been with Three now for over 6 years now, first of which on payg, had no issues, always helpfull, whenever I have had signal issues (which occurs less often than other networks I can think of) I've had my bill reduced and signal generaly has been better than most networks I have been on, or friends are on. as for cancelling, no worse than other networks or indeed any company that people subscribe to.