Hi! I understand you'd like to add a new card to your CardBrother app because you lost the number on your old card. Let’s get this sorted out.

Just to confirm, are you trying to:
1. Add a completely new card to your CardBrother account, or
2. Update or replace the details of the lost old card already in your account?

This will help me guide you better.

Meanwhile, here’s a quick general way to add a new card on CardBrother with your iPhone (iOS 18.7):

1. Open the CardBrother app on your iPhone.
2. Log in to your account if you aren’t already.
3. On the main screen or in the menu, look for an option like “Add Card” or “Add New Card.”
4. Select the type of card you want to add.
5. Enter the card details carefully — including the card number, expiry date, and any security codes as required.
6. Confirm and save the new card.

If you previously had an old card that’s now lost, and you want to remove or replace it, often you can delete the old card from your wallet or account settings before adding the new one.

If the app requires verification or you cannot find the option to add a new card, let me know what you see on your screen or any error messages so I can assist you further.

Would you like to proceed with these steps, or do you need help with replacing an existing card specifically?