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Home > Help & Support > Knowledge Base > Security > 2FA FAQs > Why are Duo authentication calls sometimes marked as “Scam Likely”?

Why are Duo authentication calls sometimes marked as “Scam Likely”?

Duo phone callback authentication calls to T-Mobile devices are sometimes mistakenly identified as "Scam Likely." We have noticed that more and more cell phone service providers are blocking 2FA phone calls. As a workaround, you can use Push through the Duo Mobile App or bypass codes to prevent this from occurring.

For more information please refer to the Knowledge Base Article on Duo.com.

Last modified: September 15, 2020

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