First, you have to verify your identity which only takes a couple of minutes. Once you pass verification, then:
From the Dashboard, tap on the “Add Funds” option and select the “Credit/Debit Card”.
Pick Polkadot and enter how much you would like to spend.
Enter your credit or debit card details.
Confirm your purchase and you’re done! Your funds will instantly appear in your Nexo account.
By making a successful purchase of crypto, your card details are automatically saved so you can select that card for future transactions. There is no limit as to how many cards you add to your account.