When we buy new phones we keep the old ones (that still work) and put a couple off to the side just recharging occasionally. My question is can we reactive one of our old cricket phones on another one of our lines if needed or does it need to be the same line? I would think since it's a cricket phone it can be any line but just wanted to check. And yes, I'm sure there would be an activation fee but still the best deal for five phones I've found. Thanks.