Looking around the Canadian Apple website, I find:
http://www.apple.com/ca/iphone/features/facetime.html which says in very small print:
"FaceTime requires iPhone 4 or fourth-generation iPod touch and a Wi-Fi connection for both caller and recipient." This implies (and from all the chatter in different forums about j***breaking iPhones to use 3G network for FaceTime), I wonder if FaceTime is a WIFI only option.
Here is much more information regarding Rogers' data plans and actual usage from someone in Canada who did some usage calculations:
http://www.iphoneincanada.ca/iphone-news/how-much-data-does-a-3g-facetime-call-u se-on-rogers/
Obviously, if you intend to use FaceTime extensively, you would want to do it over WIFI whenever possible to control data plan costs. Also, unless your phone is j***broken, you are probably restricted to WIFI only anyway.
Definitive answers available online: http://www.apple.com/ca/support/contact/
and via telephone:
Canada Technical Support:
1-800-263-3394 (English)
1-800-263-3394 (French)
1-866-852-7753 (Education Customers Support)
Finally, some developers are speculating that FaceTime over 3G will be enabled in forthcoming iOS5. Since the man himself said months ago that if enabled over any network, it would be the 4G network, I am skeptical of this rumor (as it concerns 3G), but anything could happen:
Source of this speculation:
June 8th, 2011
http://blog.macmanltd.com/2011/06/08/facetime-over-3g-in-ios-5/
So in sum, log your telephone onto a WIFI network, and see if the FaceTime icon appears, and gives you FaceTime capability.
Good Luck,
Keith