I thought 3 had dispensed with the 'Unlimited' claim.
In the 5 years I have had a 1gb (now 2) 'unlimited' allowance with 3 I only went over once or twice. The first text I got said that I had gone over my allowance and any more use COULD result in me getting cut off. For the next week every time I logged on I would get the text saying not to but then after the second week they stopped. I think they realised that for the odd time that I did go over compared wit the number of times I got no-where near my allowance limit they couldn't really call it a 'fair use' policy if they did cut me off. I believed that my use was fair. I usually didn't get any where near 1 gig but sometimes I did, that seems fair to me.
NOW however I think 3 were the first of the operators to say 'ok 1gb is not unlimited it's 1gb' so they have dropped the unlimited from the contract. So for the person above who was cut off after going over their 2gb, it's probably cos now that's what they do. It's no longer unlimited, it's 2gb. I contacted them and got my 1gb changed to 2 as I have the TRULY unlimited music downloads from Nokia's Comes With Music service, now called Ovi music and I do use a lot more than 1gb a month now.
£ have been the best as far as I'm concerned. They had a bad rep when they started out but are good enough now. I love em!