You seem to be implying that a foreign company would want to come into Canada and take 100% control of a domestic telecom company. I don't think that's the case. I think they would like to partner with companies. They would perhaps not be interested in 100% ownership.
If we look across the OECD countries that do not have restrictions on foreign investment in the telecom sector, we see that very few foreign companies have actually tried to get total control over a domestic operator. There are certain cases, but in most cases they are content to be minority stakeholders. This is the case in the mobile sector, where foreign companies have come in and have helped to develop the sector, but through a minority shareholding.