I have Verizon on my cell and AT&T on my IPad. (That way I can use either one for a hot spot). Which one do you think provides the best service up there?
I don't personally know too much about that, but I found this webpage helpful:
http://www.tripadvisor.ca/Travel-g153339-c163066/Canada:Mobile.Phones.In.Canada.html
Re: southern Ontario:
As Pierre mentioned above, I'm sure there will be some eastern Canadian chasers that will disagree with me

However, it seems to me that, from a geographical standpoint, chasing on a peninsula is somewhat limiting. Storms, if not initiating on a lake effect convergence boundary, usually move in from Lake Huron (after being in MI) and exit over Lake Erie or Ontario (into NY). Not to mention, the road grid through much of southern Ontario and Quebec is at an old school angle to a classic north-south/east-west grid, which seems more confusing when navigating near severe storms.
There have been many strong and some violent tornadoes in southern Ontario, though discrete supercell modes are less common there (similar to the eastern US), with more tornadoes probably coming by way of QLCSs. Locations of tornadoes are even less predictable along these, and most people don't typically like chasing lines.
The 401 highway corridor is Canada's most heavily populated region, and like I mentioned before, visibility is generally worse there due to a combination of air pollutants and frequently high humidity. Vegetation would be like something between the west and east sides of the I-35 in OK. Again, less than optimal, but not impossible.
The west on the other hand has also had a few violent tornadoes (the deadly Edmonton and Regina tornadoes, as well as Canada's only EF-5, in Elie, MB in 2007). Here though, it is much less heavily populated with better visibility, a great road network, and with more discrete supercell events. Sorry ON!
Scroll down to see a map of all recorded Canadian tornadoes (cute hey?):
http://www.ec.gc.ca/scitech/default...5-1&xsl=privateArticles2,viewfull&po=4008C164
The most chase-able ones occur in the prairie provinces - the western "blob" (AB, SK, and MB from W-E). The upper image is of the Elie EF-5 tornado.
So next July after the spring season when you're baking under a ridge with boring weather, and you're eager to satisfy those chasing urges, come check out the Canadian prairies. It's about $0.73 to the CDN dollar and falling! (This coming spring in the plains is gonna be tough on my wallet).