I would say that history shows that when you have four operators, you'll be able to enjoy more competition. Therefore, that will be shown in the prices and different offers available to consumers. Otherwise, fewer players means less competition.
It's true in Canada, but it's true elsewhere. There have been many debates take place in Europe regarding the need for three or four operators. Most of the competition bodies there were in agreement. Quite simply, they found that a fourth operator would bring more competition. This is how it works.