looking for Canadian Users

Hi Forum
Are there any Canadians out there who are locked into Rogers contracts?

Hey, ya i was mislead and signed with rogers.
I asked around about the best way to have an international phone.
They said to get a phone that unlocks.
So asked two different rogers stores and they said it was ok and they do it all the time!!
So got a Nice Blackberry signed my life away for 3 years!! They they say no you can not unlock the phone. I am not a cell phone wiz but makes sense to unlock phones when travelling.
My question is will they void my contact if i find a way to unlcok my phone.
And how will they know i unlocked my phone??