Phone Number Portability

Yesterday I had a Bell number, and today it rings through to a Vonage VOIP phone. If a Bell landline can become a Vonage number so easily, can I get them to grab my Bell cellphone number too.. and then give it to another carrier? I am sure number portability is feared by some of the big carriers here in Toronto, as I seem to know people who want to get away, or have switched from nearly all the big mobile phone companies. Many of my friends have stayed with their current carriers only because of the rumors of future number portability. Nobody likes to change their phone number. I expect that when this finally becomes possible, I will switch my number to Rogers, as they continue to provide a great Internet service.