Android: How to Fix Fingerprint Sensor?

It is no surprise that fingerprint sensors have become so important in Android smartphones. We have been able to increase the security of our phones by enabling biometric security. In addition, it has made it incredibly simple to unlock our devices. However, what happens when your fingerprint sensor suddenly stops functioning? Today, we will discuss 9 different solutions for fingerprint sensor troubleshooting. The article will discuss a range of solutions, including the simplest as well as the most complex ones. As you try out these solutions, read this article in chronological order to save time and resources.

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How to Fix Fingerprint Sensor – Physical Fixes

The fixes that we’ll be discussing under this category are very simple ones. These are usually the problems that may be overlooked because of panic. It will help save you time if you go through these first before trying out software fixes because the problem may only be external.

1. Make Sure That Your Fingers are Clean

For the security of your Android phone, your fingerprint sensors need to be sensitive enough so that they can be used for authentication. It takes into account the very fine details of your fingerprints to be able to make sure that no one else other than you can access your phone. This is one of the reasons why it is imperative that your fingers are clean when you are using your fingerprint scanner.

Having wet, moist, oily, or dirty fingerprints can make your fingerprint scanner have a hard time reading them. It is quite common for people with sweaty hands to experience this problem.
The solution to this simple problem is to wash your hands and make sure that they are completely dry before you scan your fingerprints.

2. Clean Your Fingerprint Sensor

When you have a fingerprint scanner that won't work because of dirty fingers, it will also not work if the scanner itself is dirty. It is imperative to note that moisture, oils, and dirt will also affect the performance of your fingerprint scanner, just as they do with your fingers.
The most effective way to clean your scanner is to use a cotton swab. Since these cotton swabs are small and gentle, they will be able to get into the nooks and crannies of your sensor without damaging it. You can use either isopropyl alcohol or water to help with the cleaning process.

However, be careful not to soak your cotton swab. You might know, that your fingerprint scanner is sensitive, so if moisture seeps into it, you might harm it, instead of just cleaning it. It is also possible to use a microfiber cloth as an alternative. Microfiber cloths are gentle and will do the job just as well. In contrast to the cotton swab, however, microfiber cloths may not be able to reach into the creases as well as cotton swabs.

3. Check For any Damage to the Fingerprint Scanner

In most cases, the fingerprint scanner on an Android phone can be found intact on the back of the device. This means that it should not wiggle or move when the phone is in use. As a result, if the fingerprint scanner on your computer has a clicking sound or if it tends to move around a lot, that could be the cause of the problem.

Do not try to fix this problem unless you have experience with repairing phones, since this is a more advanced issue. It would be safer to bring it to a service center to have it inspected by a professional. It is possible that you might cause more damage if you attempt to fix this by yourself without any experience.

4. Remove Your Screen Protector

In some cases, your screen protector may interfere with your scanner from scanning your fingerprints. You may encounter this issue if your fingerprint scanner is placed on the front and if your screen protector is covering the scanner.
If there are cracks or scratches on your screen protector, they could be blocking the sensor's view. The solution is to replace or remove your screen protector in order to allow the sensor to read your fingerprints properly.

Fixing Fingerprint Sensors - Software

As compared to the previously discussed fixes, these ones can be more advanced. The majority of these options are pretty straightforward when it comes to doing them, although some, such as factory resets, can be more complicated. When you go through this list, be sure to try them out in chronological order because the latter ones are more complicated.

1. Reboot your Phone

The most common way to fix most problems is by restarting your device. Generally speaking, this fix solves most software problems, though it is advisable to try it out first before trying out any of the following fixes.
When you restart your device, you will be able to get rid of any temporary bugs or glitches that may have occurred. Moreover, it will also shut down any apps that run in the background, which will help your phone perform better.
If you wish to do so, hold down the power button for a few seconds and tap the Restart option. It is also possible to long-press the power button in order to do so. By doing so, you will automatically force your device to restart.

2. Update your Software

The fingerprint sensor might not be working because of a glitch in the system. The problem can be caused by outdated operating systems on some devices.
Make sure you have the latest version of your device. All you have to do is go to your phone's Settings, then scroll down to System update. From here, you can see if your system is up to date or needs an update.
Developers are constantly updating the systems to make them better for users. As a result, it clears out bugs and glitches in older systems. If you have an old system, you might have these problems.

3. Calibrate your fingerprint

If you work in the industrial sector or any other field that could cause injuries to your fingers, it may explain why your fingerprint sensor is not working. In the event that your finger has been injured, burned, or has passed through something that would affect your skin, then your fingerprints are likely to be altered. For this reason, your fingerprint scanner cannot recognize your fingerprint. You simply need to recalibrate your fingerprint in order to resolve this issue. You should scan your fingertips to register them.

4. Factory reset your device

As a last resort if the problem is a software problem and none of the solutions above resolve the issue, perform a factory reset.
A factory reset is exactly what it sounds like. Brings your phone back to a factory-fresh state. You'll get better performance and speed, and it'll get rid of any malware or viruses.
You should only use this as a last resort since it will also erase all your data. That means all your settings, preferences, and personal information will be deleted. If you're ready to proceed, a factory reset will be the appropriate solution.

Fix Fingerprint Sensor - Professional Help

Once you've tried all of these fixes and nothing works, you should call a pro. There comes a point where DIYs will not be able to help you. Don't try to fix the problem yourself by opening your phone. Leave it to the pros. You might end up doing more damage than good.
When nothing works, take it to your local service center. They're better equipped with the right knowledge and skills to find and fix the problem.