Please refer to “2FA Changed & Lost Device Guide” in the user manual for more details.
What should I do if I lost my 2FA registered phone?
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Category: Two-Factor Authentication (2FA)
What should I do if I plan to travel oversea and want to use 2FA service?
We suggest you to register a second device for the backup purpose. (See “2FA Service User Guide” for details). We offered two authentication methods with “Duo Mobile” app. “Duo Push” will require you to have internet access and only use a small amount of internet data traffic. Instead, you can use the “Passcode” (one-time) which […]
How many devices can be enrolled for 2FA service?
You can register as many devices as you need. We recommend you to register at least two devices for backup purpose. You can register another device via your self-service page. For more information to manage your 2FA device, you can refer to “2FA Service User Guide”.
What should I do if I cannot access Google Play Store in China for 2FA service?
If you cannot download the Duo Mobile from Google Play Store, you can download Duo Mobile APK. For more information, please visit “Does Duo Mobile work in China?”
What should I do if I receive any unexpected 2FA notification?
You should tap “Deny” to reject and protect your account . If necessary, you need to change your account password immediately for security reasons.
What should I do if I cannot receive Duo’s Push notification of 2FA service?
Please check the internet access if you cannot receive push notification. As some phones may have difficulty determining whether to use WiFi or cellular data, you can turn off one of the connection to resolve it. You can choose to use “Passcode” if you have any problem in using “Push” notification. Another is about Google […]
What kind of device can be registered for 2FA service?
You can use your mobile device and tablet that supports iOS or Android by “DUO Mobile” application.
What is the difference between “Mobile” and “Tablet” during 2FA registration?
Mobile Requiring a phone number for registration; Suitable for phone device; Can use “push” and “passcode” (One-time) for authentication. Tablet (Recommended by ICTO) Do not require phone number for registration; Suitable for phone device and tablet; Can use “push” and “passcode” (One-time) for authentication. The option “Mobile” requires you to input your phone number […]
Systems that are protected by 2FA
Read More →Is it necessary to input my phone number during 2FA registration?
No, it is not necessary to provide your phone number during registration. We provide “Push” response and “passcode” (One-time) authentication methods which generated by the “Duo Mobile” application without requiring your phone number.