When I ported my number from Bell almost 2 years ago, I called them to confirm that they had received it. They confirmed they had my order and their dates matched those from VOIP.MS. I believe that by law, they are not allowed to contact you to counter offer to stay back. Something about landlines being a regulated service...
When I got my final bill, they did charge me some deactivation fee for calling features I had. It wasn't much, but left me an even more sour taste in my mouth. I was so glad to leave Bell, that I wasn't going to fight it. So, if you want to save that fee, put in a request to end any additional features on your line about a month before requesting the port, but don't deactivate your line! Otherwise, you could loose your number if your line is deactivated before the port has been completed.