Unlocking off contract iPhone with the carrier that locked it

Wanted to update with my recent experience of unlocking an old Bell iPhone 4S:

It was used under an old corporate company account. (phone was used on the bell network for over a year)

I wanted to get it unlocked but I was never the bell customer.

Read about the prepaid method so I activated a new sim card(got for free a while ago) with $0 balance and made sure the imei is on file(not sure if it matters)

Called the next day to the loss prevention department directly at 1-800-509-9904. They handle all bell unlocks.

Was able to have the phone unlocked right away and they charged my credit card $50 + tax separately allowing me to never need to add money to the account.

If you call and your not a bell customer they will tell you right away that they cannot unlock your phone.

This method beats out those third partly unlocks as its still cheaper then most plus its the most reliable. If you have a Rogers/Fido iPhone then those cheap third party unlocks are worth the risk.

I have a different experience. I bought a used 4s a long time ago, and wife used on Bell for a couple of years. She has since upgraded the phone and still under contract. Contacted Bell about unlocking it and was told it was black listed. My guess is that whoever I bought from defaulted on their Bell contract. It is not blacklisted with Apple - works fine and registers, etc., but Bell refuses not to unlock it. It's now an Touch essentially.