在「Android Gets FIDO2 Certification—Now Supports Secure Passwordless Logins」這邊看到 Android 7.0 支援 FIDO2 了：
If you have already installed the latest update of Google Play Services released earlier today, and your Android device is running Android version 7.0 Nougat or above—Congratulations! Your device is now FIDO2 Certified.
所以在 browser 有配合的情況下，可以用手機當作 MFA，而且 anti-phishing...