free calls & Google voice in canada

Probably worth pointing out that the technology has moved on. No need for messing about. Just get a working google voice number, see below or google how, then use acrobits softphone app (android or Apple) and set it up in there. There are quite a few others that'll do it too, talkatone, talkonaut, these two have the advantage you can text to Canada and the states for free. You can get incoming calls and dial out but be warned, quality is crap. It's good for shouting a quick message but not for long calls unless you're on very good wifi connection or 3G.