When you insert your YubiKey into the USB port (or connect it with an adapter) on your Android devices, only the features below are supported.
- Yubico OTP
- Yubico Authenticator
- Static Password
- U2F (requires Google Authenticator to be installed)
The following functionalities are not supported using the YubiKey over a USB connection on Android devices.
OpenPGP is supported with the use of a third-party application, OpenKeyChain (available on Google Play). It is also important to note that while your YubiKey is plugged in to your Android device, the on screen keyboard will no longer be accessible in Android until your remove your YubiKey.