When you change your number, there is always some work involved. Not too much, but there is some. Therefore carriers, like Primus or Bell, are by default charging for this. The purpose of such charge is to discourage people from changing their numbers on a whim (eg. someone who is constantly travelling and flipping main and alternate numbers, or just for the fun of it).

That being said, there are situations when a number change is not "on a whim" and associates have the right to waive this charge, if informed and asked by the customer (this is what "by-default" means - you need to explain your situation and ask to waive the fee):

•Customer is receiving harassment calls and the police are involved.•Customer first got a new number to try the service, likes it, and now wants to port his/her main number to TalkBroadband.•Moving.