Bank security varies: some use text codes, others rely on email or in-app prompts. While text or email codes are better than a password alone, scammers can intercept them via SIM swap scams or phishing. Authenticator apps (like Google or Microsoft Authenticator) generate codes that aren't tied to your phone number, offering stronger protection. The most secure options are passkeys or hardware security keys, which are phishing-resistant. Customers should check their bank's security settings, consider upgrading to an authenticator app, and never share a code with unsolicited callers.