Can I have multiple active SIM cards with the same phone number?

No, that's not possible.

If you need an additional SIM card for your car or your tablet, for example, you'll have to order with a new number. First of all, choose if you want to order a SIM card with a subscription, or a prepaid SIM card. Follow the steps on the page to finish your order. You also have the choice between an eSIM or a physical SIM card.