Good point! I would not put anything past our major carriers to try to squeeze more out of us.
I have had repeated calls from them to my mobile which has a 416 area code. No one ever answers.
Cell phone companies legally can't provide your cell phone numbers for any reason other than to credit companies or subsidiaries of their own company (ie other departments). The way these people get your numbers is from random dialling and when you fill out ballots or surveys with your cell number on them.
if you get charged for a marketing call on your cellphone and you're with telus, you can phone telus and tell them it was spam and they will credit your account, also with any spam text message that you get.