The location of the fingerprint reader in some phone models is due to the fact that it has had to be integrated under the screen to reduce the frames and save space. One of the drawbacks of the in-display fingerprint reader is that it can fail in different ways, since it can be unresponsive, slow, randomly fail or lead to any other problem.
Even with the passage of time, and with use, you can find this error on your mobile, regardless of whether it is high-end or low-priced. However, it is an unlock method that provides you with maximum security so that no one but you can access your phone because it requires your fingerprints. For this reason, we are going to explain everything that can cause the on-screen fingerprint reader to fail and what you should do.
The sensors under the screen can be capacitive (they work with electrical impulses), optical (they are based on an image of the finger) or ultrasonic. The latter eliminate the problems of other traditional sensors such as sweat, condensation or hand creams, and are more accurate. However, in all of them complicated circumstances appear.
The main reasons can be software failures, but it can also be due to hardware, dirt, that you are not placing your finger correctly or using a finger that has not been stored correctly.
What fails the most is the software
The software can be one of the main reasons why you are having to use the pattern or PIN, and it happens on all mobiles. Therefore, the key to get it working properly again is to optimize it or find the existing problem . You can do some basic initial checks on your phone, such as updating its operating system if there are any pending updates (in phone Settings, under System) or restarting the phone to see if it’s a temporary problem. You can also try to clean the mobile cache or an app that is not compatible.
In some cases, a new operating system has been installed that has errors of this type, so the ideal in this case is to restore the previous one or be patient. Although this means less security until the problem is solved or they release a new version that does not have it.
Likewise, you can try to restore the factory options, although you will have to make a backup beforehand so as not to lose everything because it will erase everything from photos to files, although it is the most radical option if you cannot find another and it does not guarantee the solution.
Problems in screen, sensor or protector
It is possible that it is due to a screen problem, so it is worth doing a test with an app or from the mobile itself, activating the options for developers. Another basic cause is usually the screen protector, which does not take well with fingerprints, so you can remove it, try and try a new one.
To test the operation of the pointer location you must give:
- Settings
- About of the phone
- Click on the build number several times
- Go to System
- Select Developer Options
- Find Pointer Location
- activate it
To calibrate the sensor on Xiaomi , the initial steps are the same, but the route varies:
- Go to Settings
- Go to About phone
- Give all the specifications
- Give kernel version multiple times
- The CIT is activated and a screen opens
- Gives Finger Sensor Test
- In the quality control menu, it gives an error
- get out this way
If this is the problem, you have probably solved it. If it still doesn’t respond as it should, try removing the protector as we told you. It could also be due to a damaged sensor, water, dirt, or other reasons that you or a technician will need to rule out. The same can happen around our finger. The possibilities are varied, although at this point it is most likely that you know what is happening to your mobile. If you do not get it, you will have to go to the technical service to try to find the solution.