I should have wondered about this before. Apparently it was added to my account a year ago without me knowing (they made a mistake and allowed OVP Virgin customers a phone upgrade). So I logged into my account online, and it's shown there
Good and bad news - it's a bit cheaper in UK: £3 > £1 /MB, but more abroad: £8 /MB - or you can sign up for a package; there seems to be a 4 MB free trial offer for the first month ...
http://www2.orange.co.uk/servlet/Sat...=1137070320264
It looks like the 3g tariff is the same
I checked the phone has the settings and tried it: 'Temporary network problem' that evening, but working fine now ...