Your banking details (accounts and cards) are strictly confidential: they belong to you and must not be disclosed to a third party, even a trusted one.
Verify the identity of your interlocutor before transmitting information or performing a requested action*. If in doubt, hang up and contact your advisor through your usual channels.
* Be vigilant; the displayed phone number may seem legitimate or known from your contact list (bank branch, customer service, etc.), but in some cases, it may have been spoofed by the fraudster using the "spoofing" technique. The fraudster can indeed customize the displayed number; this constitutes telephone line impersonation. Also verify the email addresses of individuals who contact you.