Originally Posted by Braindrain
Err... dual/tri-band GSM's can be bought used for dirt cheap. I just looked up the local Buy & Sell and saw a couple of them for $49 obo. Unlocking just adds another $20.
Do NOT buy a world phone with Telus because their system isn't designed for it.
And, yes, each SIM has its own number.
You can even unlock most Nokia's yourself online, it is very easy. (not N70 and other expensive Nokia phones however)
http://unlock.nokiafree.org/dct4.php
If it doesn't work the first time, use a unlocking service because there is only a few times you can try it out before the phone lock itself.