[taming]

All three offer phones operating on the GSM 850 and 1900 bands (and sometimes additional ones). The CDMA Telus/Bell (often called Bellus here) was all those carriers had until recently when they rolled out their new services--properly called HSPA + 3G, as Sensual Poet said. No new CDMA only phones are being rolled out here, as far as I know, and new phones are released with the GSM bands and no CDMA capability. There are rumours of world phones to come, which would include CDMA capability and have 4 GSM bands. If there are exceptions to this, I am sure SP will clarify further.