I`m with 3 and I love it.Sure the reception is bad (especially in Kent and North London area) but you can`t beat 1gb of data for 15 pounds a month (plus unlimited texts and 300 minutes).Also, you are not stuck with a contract.I got the N900 from gumtree for 350, a sim only from 3 with no strings attached and I`m a happy camper!