If you are experiencing issues using the NFC feature on your YubiKey with your phone, use the steps below to troubleshoot. Rule out issues other than NFC by following the Basic YubiKey Troubleshooting guide.
Note: NFC usage on iPhones is only supported on the iPhone 7 and newer, running iOS 11.3.1 and newer.
Once you have ensured your phone is working,
- Verify that NFC is enabled in your phone’s settings.
- If your phone is in a case, take it out, as the case can interfere with this kind of NFC communication.
- Ensure you know where the NFC reader on your phone is located. Be aware that because the YubiKey performs a cryptographic operation, the area on the phone where it will work is much smaller than the area for an NFC tag scan or payment transaction, so you need to be quite exact when positioning the YubiKey. If you do not know where the NFC reader is, use Google Image Search for your phone model plus "nfc antenna location", for example, "iphone 7 nfc antenna location".
- Hold the YubiKey flat against the phone's antenna, keeping it still until your phone confirms authentication by emitting a sound. It can take up to 5 seconds for the two devices to complete the operation. Some phones require the YubiKey to be held at a 45 degree angle.
If the phone does not read anything from the YubiKey and does not make a confirmation noise, set the NDEF slot for NFC usage for the slot where your credential is (slot 1 by default) and try these steps again.
If your phone reads something or makes a confirmation noise but the authentication fails, you can run a full scan in the NFC TagInfo by NXP app (available on the Google Play Store the iOS App Store) and submit the result of the scan as a support ticket.