Why is the fingerprint unlocking not sensitive after using the tempered film on the Xiaomi 15?

Sorry for the trouble caused to you. The Xiaomi 15 adopts an in-screen ultrasonic fingerprint sensor, which is more sensitive to unlock and improves the nighttime unlocking experience.
If the fingerprint unlocking is not sensitive after using the tempered film on the Xiaomi 15, please refer to the following details:
1. There are certain requirements for the screen film. Films that are not certified by Xiaomi will have a serious impact on the fingerprint unlocking experience;
2. To ensure the unlocking experience, please use the official film. If the fingerprint-unlocking is abnormal after applying the third-party tempered film, please tear off the film and re-enter the fingerprint for use;
3. The issues you reported are constantly improved, and please follow the subsequent upgrades to give you better experiences. Thank you for your understanding and support.