This is a tangent response to make you aware that if travelling in Europe, roaming is free in the Euro zone. If I get a sim card in Spain, the plan I get (sometimes for 5 eur you get 4 GB; with the company SIMyo for 2 eur you get 4 GB), would also wo...
The PM sim will not work outside of Canada (and the USA if activating something for it). You will not even have to turn off the sim in Settings -> Cellular.With an iPhone I have never had to restart the phone when changing between sim cards.