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Why SMS MFA is a stopgap
SIM swaps and SS7 abuse make text-message codes weaker than app-based or FIDO MFA.
SMS MFA beats nothing. It is still weaker than authenticator apps and passkeys.
Risks
- SIM swap social engineering
- SS7 and carrier-side failures
- Message delay during travel
Prefer
Authenticator apps with number matching, then FIDO2/security keys for privileged users.
Upgrade paths are usually gradual. Start with admins. Contact Qutzl for a tenant plan.