Unlocking phone issues?

I have the Canadian variant of the skyrocket, the sgh-i727r. I'm running CM 12.1. The other day I went to get my phone unlocked at some store, they tried stuff but nothing worked. I installed the GalaxSim app and that didn't work either. Does anyone know if there is a way which I can unlock the phone?

Sent from my SAMSUNG-SGH-I727 using XDA-Developers mobile app