Health Insurance & Cellphone coverage for trip to Canada

Again, I am the OP. Thanks for all the great responses. I have checked my secondary health insurance and they will cover me when I'm outside the U.S. Also I checked that my iPhone is unlocked. I need to wait until I'm actually in Canada to buy a SIM card. Apparently many places sell them with inexpensive plans. Without a cell phone, the emergency road service plan I have would not be very useful. By looking at cell phone coverage maps, I can see that Rogers and Bell providers have good coverage in NB,NS and PEI.