I have been a OneSim customer for over 15 years. It is cheaper to use this SIM card and a personal extra number in Canada than any of the price-fixing Canadian monopoly telecoms. I have used the card all over the world and the technology is all it says it is. Technology is a complicated thing these days and customers get annoyed if it does not work. And some parts of OneSim do not work in certain countries - SMS in UK for example on certain plans. Customer service is exemplary - real people answer your queries or e-mail you promptly if they are overly busy. Recommended highly from this customer.