Primus allows international roaming with their phones, but if you go overseas you will find it impossible to reach Primus if you have to.... they only provide a 1-800 number which is not reachable outside N. America! Needless to say, this is another case of people not eating their own dogfood. I doubt that any Primus employees actually use the Primus service, or this situation would not exist.

After multiple attempts to contact Primus, I was finally able to find an overseas internet cafe with Skype installed, and thus able to call them on a 1-800 number. For the rest of you, here's their number for their head office, which may help in a pinch: 416-236-3636