Check your settings to be sure that the NFC reader on your iOS device is enabled, or contact your device manufacturer for more information. If your YubiKey cannot be recognized on your iOS device but can be recognized on Android, the issue may be with the NFC reader within your iOS device.You can also check your YubiKey's warranty. Check your YubiKey configuration settings and be sure that the NFC reader on your mobile device is enabled. If your YubiKey cannot be recognized on either an iOS or Android device, the issue may be with the YubiKey itself.Your YubiKey and/or mobile device's NFC reader is working properly – you can test this by downloading an NFC reading app for iOS or Android and scanning your YubiKey.LastPass delivers both personal and business customers with the flexibility to authenticate into the LastPass vault using any cell phone or landline via voice call and SMS. The YubiKey NEO's NDEF tag is correctly configured using the YubiKey Personalization Tool. LastPass now provides the flexibility to authenticate into the LastPass vault and configured single sign-on (SSO) applications with SMS passcode, voice call or Yubi K ey.You are using an iPhone 7 or newer and running iOS 11 or later.You can identify your YubiKey to ensure you are using YubiKey NEO.

You are using a YubiKey NEO which can be used with USB-A ports and an NFC reader.Apologies as I'm not sure what you've tried to troubleshoot the issue so far. Could you please verify the following:

Yubikey last pass