How to unlock a brand new iphone?

I bought a brand new iPhone off of my friend, she was with bell and I'm with rogers, I need to unlock this phone so it can take my sim card. I know you can go to the mall phone stands or a rogers store that they can do it for you but this phone ia brand new and I have to still go through the set up. The third step is to activate the sim card but I can't because the phone isn't unlocked yet! What do I do?

First you need to activate it using the same carrier it is locked to, so get a Bell sim card and activate it. Then you can unlock it, but it will then cost you $250 because Bell unlocking is the most expensive in the entire planet.

If you would like, try contacting this website and see if they can unlock it for you for less, because they unlocked one of my phones once for much less than the market price:

http://www.cellsunlock.com