Samsung SGH275m

I need to Unlock this phone from Bell Canada, and am investigating to get a free code. I could not easily find a code online for the phone for free. Compared to other Hacking on other things that is unusual.

So I thought to ask in this forum, why It is so hard to get the UNLOCK CODE?

Also, if I have two of the same phones to unlock will the same unlock code work in both phones or would I get two different codes dependent on each phones IMEI Number?