My bank does send Flash SMSes for 2FA codes as an optional fallback to the chip+pin-card based 2FA keypad, that does both time-based and challenge-response to a

My bank does send Flash SMSes for 2FA codes as an optional fallback to the chip+pin-card based 2FA keypad, that does both time-based and challenge-response to authenticate the transaction, and is mandatory (i.e no SMS fallback) for adding people's IBAN and outbound transfers.