American airlines may let you use your mobile devices at every stage of flight, but their Canadian counterparts still insist that you power down until youre in mid-air. Thats going to change shortly, though: Transport Canada has greenlit the use of electronics during takeoff and landing. As long as carriers can show that passenger gadgets in airplane mode (that is, with wireless off) wont interfere with avionics, youll get to use your gear at any time.