What happens next in this paragraph?

How to use a sim card to switch phones
Open the contacts list on your original phone.
It's possible to back up your contacts to your sim card before transferring it, but this isn't always the most convenient option. It's useful if you're moving to a dumb phone, but if you're using smartphones your contacts are typically synced with your google account or apple id.
Open the menu and select " export " or similar option. Select your sim card as the destination for the exported contacts.