Yes, it is very possible, all you would need is an unlock code from the carrier you are going to use it with, you can accomplish this by calling your new carries technical help and they should be able to hook it up for you, if this doesn't work you can also look for an "unlock code for Black Berry curve" on ebay and this would unlock it to be used freely with any carrier.
Your blackberry is locked with rogers means, you can not use other networks..After unlocking you can use any network..This unlocking can be done through codes.If you need an unlocking code,get it from Wickedunlock.com .It helps to unlock your mobile easily.