I didn't even know they would do that for you. What did you have to tell them to get them to do it?
Yeah, if you call them, they charge $50 to unlock your phone, provided you are off-contract otherwise you pay a penalty to be released from your plan.
In the end, I couldn't get them to do it for me. My cellphone was registered to my old company, and when I quit my job, they didn't transfer the phone to my name (not the SIM chip, the actual device). So when I called Rogers, they told me since I wasn't the registered owner, they couldn't do it for me. This is BS, because if you buy a used iPhone off eBay or Craigslist, how else would you prove its yours to unlock it?!
Anyway, it was an exercise in futility explaining all this to them, since they have a vested interest in seeing phones locked to the Rogers network. I ended up paying $100 to one of those phone unlock companies on the Internet, and they did it on my behalf.
Well worth it, Canada and US plans are very expensive compared to the rest of the world. As we move from country to country, we just pick up a new SIM chip and we have cheap mobile Internet anywhere we travel, and they don't charge extra to tether it to your computer or another phone!