Yes..You can swap your sim card..Before that you have to unlock your mobile..
This unlocking process can be done by many ways like box, cable, code, s/w etc.,Among these, code is the safe & easy method of unlocking compare to others..
I found an unlocking service at Prounlocking.com .
This is the online service provider which offer you the code at cheap price..Through this you can unlock your mobile easily..