Oh yeah, I remember that now. I called AT&T before our trip and had to be transferred to another department that turned on international calling. They said that for people who have the phone less than 30 days, they have to do some special things to turn it on.
We only made the one call, I turned off my e-mail account, and didn't use the web because of the $3000 phone bill scare from someone else on this forum. I used 1kb of data, which should only be 2 cents. Text messages are 50 cents to send while roaming in the UK.