Short answer: Install the IDEX Card app, choose enrolment, hold the card flat against the top third of the screen, you will need to enter your PIN, or set if this is the first use. Then place your finger on the card's sensor repeatedly – lifting it clean off and shifting it slightly between presses – until the app confirms enrolment is complete.
Before you start
You need your IDEX card, an iPhone running iOS 16 or later. A new card has no PIN yet – the app asks you to set one the first time you use it.
Step by step
- Install the app – IDEX Card on the App Store.
- Scan your card in the app, then choose the option to add a fingerprint. Keep the app open in the foreground with the phone unlocked.
- Position the card – hold it flat against the very top of the front of the phone, screen facing you. The NFC antenna sits under a small area near the top edge, and small position changes make a big difference. Slide the card slowly up and down by a few millimetres until it is detected, then hold it completely still – movement resets the connection. Remove your phone case first, especially thick, metal, magnetic or MagSafe cases: they can block or weaken the NFC field.
- Set your PIN – or enter it, if you have already set one. Choose it with care: it cannot be recovered, and too many wrong attempts permanently block the card. See: Set your PIN.
- Capture your fingerprint – the sensor is the small black square in the bottom-right corner of the card. Rest the pad of your finger flat on it, press firmly enough for full contact but not so hard that the card lifts off the phone, and lift your finger clean off between each placement. See: Tips for a successful enrolment.
- Finish – the app shows how many placements remain. Keep going until the app confirms enrolment is complete.
See: The phone cannot find the card and The card will not enrol.
Changing the fingerprint later
Fingerprints can be replaced after issue, using the app and your PIN. See: Re-enrol or delete a fingerprint.