You can use both debit and credit cards to purchase cryptocurrencies through Simplex.
Please note that depending on your issuing bank, you may incur additional fees when using a credit card.
The issuing bank is the financial institution that issues credit and debit cards to customers on behalf of the card networks, such as Visa and MasterCard. Issuing banks are also known as card issuers.
In general, debit cards are more frequently approved than are credit cards.