Hi all GSM phones which are unlocked from network lock can be freely used with rogers sim .Else if the phone is locked to some other network providers like fido ,telus and so on then you can't use it with any other GSM sim until you unlock it .You can easily unlock your phone using sites like WickedUnlock.com they are providing unlock code for all mobile models at reliable cost .You first check that whether the code is available for your mobile model ,country and network provider .If yes then pay for it and unlock your phone .After unlocking your phone you can freely use it with any GSM sim .