Hi! I saw for a long time now that when I customize my car (I think with every car) I have a free option to get a different license plate number. The exchange doesn't change anything about the license plate design/color, just the plate number.
I asked a friend about it, and he doesn't have this option.
1. What's the purpose of that? Why is it even there?
2. When is it unlocked? a specific mission or level?