The settings wizard on my 5800 doesn't have an option to set operator settings, only to set up email. I've tried rebooting, but no joy. I've tried the T-Mobile website but the 5800 isn't listed yet so I can't use their automated service, and on the Nokia site it just says to use the settings wizard. Which I would, if operator were listed and not just email!!

Does anyone have any ideas?

Pick any Nokia device from the T-Mobile web site. The settings should all be the same.

Of course; I was being a bit blinkered, there, I think :) Thanks.