Nokia 9 has a security flaw related to its fingerprint sensor that is tricked by non-registered patterns of other fingers and even various items such as coins or gloves. The most recent update for Android 9 Pie 4.22 includes the patch from HMD Global. Phone owners say they can unlock the gadget with almost any touch, including random taps and fingers wrapped in cloth. The next OTA update should fix the sensor so its better to disable this feature now and use traditional PIN codes or graphic patterns.”]
Source: https://gbhackers.com/nokia-9-pureview-fingerprint-sensor/