technically it should work on bell/telus' cdma network.
But i'm 99.9% sure bell/telus won't activate any phone that is not sold by them.
unlock maybe? I dont know how the CDMA network works cause it doesnt use SIM cards... so you cant just put in a sim card and use the network, even though with my Iphone I can select Bell 3G or Bell (CDMA) obviously it doesnt work on Bell (CDMA) but its an option...
if it was sim based / gsm / hspa its easy to just throw in your sim card. but for a cdma phone you need someone at bell to activate your account with the ESN from the phone. but they have a very strict policy against activating grey market phones
it also has a 3G backbone, I saw in one of the reviews, so if your in a 3g coverage it uses that instead of 4G or sprints CDMA.. it has everything so it should be possible fo run on Canadas 3G networks
here is an article stating my thoughts on CDMA and release in Canada
http://www.androidincanada.ca/android-phones/when-will-the-htc-evo-4g-android-phone-come-to-canada/