I have a UK 3 SIM card (& a T Mobile SIM card), I shall check how well (if at all) the 3 SIM card works in the device & let you/anyone else interested know if there were any problems etc. However, in the meantime, you may also want to see this link (if you haven't done so already)... EDIT: Also see thread 'Important UK issue - N900 doesn't work on 3 mobile' Regards https://bugs.maemo.org/show_bug.cgi?id=5315