Makes little difference to me now as I can give them 30 days notice in 8 days time.
3 have been, by far, the worst operator I have ever had to deal with.
They could give me a contract, reduced by 90% per month and I still wouldn't take it as they are just soooooo amazingly poor with their customer services.
I took out an 18 month contract last year with half price line rental automatically attached, purchased from 3's own website. After 6 months they started billing me full price so I rang to complain, spent 30 minutes on the phone trying to rephrase the problem so that they could understand just to be told I would get a call back from billing in 72 hours. The problem was resolved but I have had to call them every threee months as they said they can only attach the promotion for three months at a time.
Sorry to rant but I will never use them again.
Also, there is an old thread on the changes at Three
here.