So I am getting an unlocked at Gs3 and right now I have the gs2 skyrocket. Does metro cut sim cards, because the skyrocket use the standard sim cards while the gs3 uses the mini or micro. And if i were to take my existing MetroPcs sim card and put it in the gs3 could I just activate by calling *228 or would I have to go in a store to add the imei to my list?