There are two ways to link your external debit card through the Chime app:
Via the Move tab:
Tap the Move tab.
Tap Transfer Money.
Tap From.
Select Add another account.
Select Debit Card.
Follow the prompts to link your external debit card.
Note: The external debit card must be in your name to be successfully linked.
For initiating instant transfers, Chime doesn't accept:
Credit cards
International cards
Chime debit cards - you can’t use your Chime debit card to fund transfers into your Chime account.
Gift cards