Why can't fingerprint unlock on samsung S22 after installing screen protector?

Why can't fingerprint unlock on samsung S22 after installing screen protector?

After the release of the new Samsung Galaxy S10 series, it can be seen that all mobile phones use ultrasonic fingerprint recognition, and some mobile phone

manufacturers will give away mobile phone screen protectors when they sell them. The original screen protector supports fingerprint unlocking.

However, after a period of use, many phone screen protectors purchased by consumers themselves cannot be unlocked with fingerprints.

Ultrasonic fingerprint recognition means that the sensor emits high-frequency sound waves to hit your finger to draw a 3D pattern about your fingerprint, which is significantly more advanced than optical sensors. This technology is also more secure, avoiding fingerprint films and 3D graphics. Risks from printing fingerprints. And you don't need to put your finger under the screen for so long or press, just touch it to unlock. It is worth noting that the sound wave is not afraid of ash and water, and can be unlocked even with dirty and wet hands.

However, such an excellent ultrasonic fingerprint recognition technology is also flawed. After attaching an ordinary phone screen protector, the ultrasonic fingerprint recognition cannot work due to the thickness of the tempered film. However, some netizens commented that you can attach the phone screen protector first and then record the fingerprint.

In response to this phenomenon, many factories that produce phone screen protectors,
1. Directly cut a hole in the area of ​​fingerprint recognition. Can you accept this tempered film?

2. Thinning the glue part of the phone screen protector will not affect the fingerprint unlocking.

3. There is also a common UV glue phone screen protector, which can also support fingerprint unlocking. The biggest feature of this phone screen protector is that the curved surface is covered with full screen, and there is no black border. But it is also one of the most difficult to paste. It will test your ability to install a phone screen protector.

So which one do you like?

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