Security methods are key in the daily use of smartphones, among them the fingerprint sensor is the most popular as it provides us with a fast and very reliable average. This is, however, not without some problems that we encountered when unlocking Samsung phones with both an on-screen and rear-mounted fingerprint scanner.
These problems span all price ranges, making them common problems that we can solve with the same user interface and with different tips. Before going directly to our fingerprint reader problem, we recommend that you use alternative vibrations in other tasks because this may be the case where we personally work for us.
Contents [show]
- Fingerprint sensor does not respond on Samsung Safe Mode solves the problem
- Dry your mobile completely
- Reconfigure the fingerprint scanner
- The problem is the protector or your fingers
Adding a fingerprint to a Xiaomi phone
First, let's learn how to add a fingerprint on Xiaomi and Redmi smartphones running MIUI 12. The procedure will only take a few minutes.
1.Open Settings and go to Passwords & Security.
2.Go to the “Fingerprint Unlock” tab, which looks like a large blue square.
3.Click on the “Add fingerprint” line.
4.Place your finger on the scanner from all sides. Hints will appear on the screen to help you position your finger correctly. Hold your finger in one position for several seconds, but do not press hard on the scanner.
5.When a notification appears that the fingerprint has been created successfully, click “Done” in the lower right corner.
This way you can add multiple fingerprints. They will be displayed in the settings under different numbers.
Note! Hands must be clean and dry. The print will not work if the skin has cracks or cuts. Also, you will not be able to unlock your mobile device using a scanner if you are wearing gloves.
Software glitch
In this case, it is recommended to overwrite the entered data. It is also worth performing this action when the fingerprint was photographed incorrectly, for example, at an angle, as a result of which the device cannot recognize it.
To do this, you need to go to the settings, where you select the item “Locking and protection” - “Manage fingerprints”. Here you enter a pattern key, after which in the window that opens, click on “Add fingerprint”.
Then you need to enter a new fingerprint, and then try to unlock the phone again. If this does not help, then you can use another method to solve the problem.
How the fingerprint scanner works
The scanner can be located in three places: on the back of the case, on the side near the power button, or under the screen itself. The first two options are found in phones from the low and mid-price segment. Only flagship devices are equipped with under-screen scanners.
Now let's find out how the fingerprint sensor works. The lines on the fingers are called papillary patterns. Minutes (pattern sections) are interrupted, bifurcated and merged differently for everyone. It is because of this that the print is unique. The sensor remembers your papillary pattern, and the smartphone is unlocked only if a finger with the same lines touches the sensor.
Fingerprint sensors are divided into three types: optical, capacitive and ultrasonic.
1.Optical sensors are found in smartphones with AMOLED screens that implement under-screen technology. Essentially, it is a camera that takes a photograph of the fingerprint and stores it. Recognition occurs using light. The user needs to touch the display in a certain place, after which the lock will be removed. Of the minuses: the optical sensor begins to work incorrectly if dust or moisture gets on the display.
2. A capacitive scanner consists of conductive plates, the thickness of which is less than the papillary pattern. In such plates a capacitor with a current charge is formed. And the papillary pattern of each person is made up of unique protrusions and depressions. The sensor uses voltage to recognize them and determine who the fingerprint belongs to. Such scanners are placed on the case or near the power buttons.
3.Ultrasonic sensors were the last to be implemented in smartphones. This technology was introduced by Samsung. This is the best scanner option that can provide security by creating 3D images. Moisture and dust also do not affect fingerprint scanning.
Recording and control algorithm
The fingerprint scanner works on a simple principle. A special sensor recognizes patterns on the fingertips. These lines are unique to each person. Photocells, after the finger is placed close to the scanner pad, photograph those areas of the pattern on the fingertip that do not touch the pad. That is, the scanner reads not those lines that protrude above the skin, but those that are located between them.
Xiaomi has some of the fastest scanners. Unfortunately, they are far from the most effective. They may not identify the print if the owner's hands are wet, sweaty or dirty. If there is even a minimal amount of greasy stains on your hands, the scanner will refuse to perform identification.
Therefore, if the sensor refuses to read the pattern, it needs to be wiped and hand hygiene performed. If it works, then everything is in order. If not, then the reason is either hardware or software.
Why does the fingerprint scanner not work?
Added a fingerprint, but it doesn't work? Let's look at three main reasons that can affect the performance of the technology.
Moisture ingress
Liquid has a detrimental effect on the fingerprint sensor. If water gets inside the case, the scanner will most likely stop responding to touch. To minimize the consequences, use the instructions below:
1.Wipe your phone thoroughly with a dry cloth. Liquid got inside the connectors or got stuck in the recess with the scanner - then use cotton swabs. Do not heat the device with a hairdryer, as this will only disperse moisture throughout all elements.
2.Place the smartphone in a plate with rice so that the grain removes moisture. Seal the bowl tightly and leave overnight.
3.In the morning, check the device again and turn it on. The scanner should work fine. If it still does not respond, contact the service center.
Mechanical damage
This is also a rather unpleasant situation, which is not always possible to cope with at home. Most often, the sensor is damaged due to improper disassembly of the phone when the scanner cable breaks. The problem can be solved in two ways: replace the tape yourself or contact a specialist.
A fall from a great height or other mechanical impact can also cause damage to the fingerprint sensor. This is especially true for optical sensors that are located under the screen and stop working if the display is damaged. Therefore, for practical purposes, it is better to purchase phones with a conventional capacitive scanner, which is more resistant to damage.
System error
Software glitches are rare on Xiaomi smartphones, but sometimes it happens. Some users note that after updating the firmware, the scanner stops working correctly. There are three ways to get rid of the problem:
1.Go to settings and create a new fingerprint and delete the old one. Life hack: for faster response, you can make several prints on one finger.
2. Discharge the phone to zero, and then fully charge it. Without unplugging the device from the outlet, test the operation of the scanner.
3.Reset Xiaomi to factory settings. Don't forget to save important information and make a backup before doing this.
Update fingerprints in Touch ID
Quite often, the error “Cannot complete Touch ID setup” occurs after updating your device. Apple regularly releases new firmware versions for iPhone and iPad, but their installation does not always go without errors and problems. If you are having trouble with Touch ID after downloading and installing new software, try the following:
After completing all the steps described above, the “Unable to complete Touch ID setup” error should no longer bother you.
Solving Common Problems
In addition to the complete inoperability of the sensor, users also encounter smaller problems. Let's discuss each case separately:
- The scanner does not always respond to touch; use a damp cloth to gently wipe the sensor. You can use an alcohol-based solution for cleaning, but only if the scanner is not located under the display.
- The “Fingerprint unlock” item is missing in the settings - restart your mobile device several times. If that doesn't help, do a hard reset.
- I can’t add a new fingerprint - again, resetting to factory settings will help.
Now you know what to do when the fingerprint scanner doesn't work. The above information applies to both budget devices (for example, RedmiNote 9) and flagship devices (Mi 8, Mi 9, etc.). If you have any questions, write in the comments, we will help.
Force a device restart
The next option is a forced reboot. Hold down the Power and Home buttons simultaneously for about 10 seconds and release when you see the Apple logo. These instructions are intended for owners of iPhone 6 and previous models.
For owners of iPhone 7 and 7 Plus, you need to hold down the “Power” and “Volume Down” buttons, and for new iPhone X phones. First, press volume up, then volume down and hold the “Power” button for 10 seconds. Otherwise the process is the same.
After rebooting, your fingerprint should work fine.
Problems with the App Store
Another problem that can be solved is the malfunction of the scanner when using it in the App Store. In this store, Touch ID is actually the key to downloading new apps. In this case, you can “fix” the fingerprint scanner like this:
- Go to the Touch ID & Password section in Settings.
- Opposite “App Store, iTunes Store” make the slider inactive.
- Reboot your device.
- Return to step 1, activate the slider responsible for “App Store, iTunes Store”.
What to do if updating your fingerprints doesn't help?
If you followed the instructions described above, but did not succeed in getting rid of the problem in question, there are a few more tips on how to fix the error:
If none of the above methods helped fix the situation, you can try to wait until Apple releases a new firmware version and install it, it is possible that this will fix the problem. Another way is this.
It is worth noting that if you contact an official Apple service center with this problem, you will receive the answer that this is a hardware malfunction. If the phone is under warranty, Apple will repair the device free of charge (replace the Home button) or exchange it for a new one. That is why it is not recommended to try to disassemble the device yourself and try to “fix the Home button cable”, which is what various “craftsmen” recommend doing when the error “Cannot complete Touch ID setup” occurs.
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Currently, iPhones and iPads have fingerprint scanners. Often this scanner malfunctions. Then the user sees an error message: “Unable to complete Touch ID setup, please go back and try again.”
This failure can most often be resolved by simply rebooting the mobile device. To reboot, you will need to click on the Hard Reset button. Many users note this feature when only rebooting while charging helps.
That is, in order to get rid of the problem, you should put the phone on charge. When the phone starts charging, reboot the device. After this, as a rule, in most cases, the problem disappears.
In addition, the problem with the scanner will disappear after a scheduled system update. But who wants to wait for iOS to update? Of course, I want to fix the glitch immediately after it appears.
Creating a new fingerprint
If the scanner no longer “recognizes” your old fingerprint, you can create a new one. Don't forget to remove old prints first.
I'll give you short, step-by-step instructions. And you, carefully, follow the indicated path and perform the described actions.
Instructions:
Once you have completed all the steps above, everything should function normally. In addition, the message that the Touch ID setup could not be completed should no longer appear.
Conclusion
As you can see, there are not many methods to get rid of the error. Basically this is a reboot, factory reset or system update. However, there are times when nothing helps and the problem remains.
In this case, you should contact the official Apple customer support service. since failure can occur due to purely technical problems. According to the stories of those who contacted the service with this problem, some had the home button replaced, others the screen, and some were given a new phone.
Of course, replacement of the device applies only to those customers whose warranty period has not expired. So, if your warranty has not expired, then you should not fix the problem yourself, let specialists do it.
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From time to time there are complaints about the operation of the fingerprint scanner on the iPhone or iPad. There is always a small chance that the problem lies in the breakdown of this component of the device, but it is possible that you can solve the incorrect operation of Touch ID on your own. For example, if you recalibrate the scanner, clean it, and also check your fingers for damage. We've put together some helpful tips for those whose Home buttons aren't working as well as they should.
Chemicals
In some cases, along with the fingerprint scanner, the Home key itself stops responding. As soon as fatty layers from the hands, crumbs, sweet drinks and other contaminants get into it, the key functions more when pressed. To fix the problem, it is better to use WD-40 aerosol, which does its job perfectly. At the same time, you should handle not only this liquid, but also the screen with care.
If too much liquid gets on your mobile phone, other problems will appear on the device. Once the chemical is applied, you have to click on the key many times to get it underneath. Then the cleaning agent will get rid of the dirt and not only the key, but also the touch ID will come back to life again.
Touch ID scanner is broken
Failure of the Touch ID system itself is rare, but still possible. In this case, the only solution to the problem is to replace the iPhone 5s fingerprint scanner. To eliminate the possibility of error, delete all fingerprints and restart your iPhone. Add your fingerprint to Touch ID & Password again. If unsuccessful, repeat the procedure a couple more times. If after this the scanner remains blind and deaf to your fingerprints, then only qualified diagnostics and, possibly, repairs at an Apple service center will help it.
As you have seen, the fingerprint scanner on the iPhone 5s does not work or functions poorly for a variety of reasons. You can easily and quickly solve most problems on your own - a visit to specialists is only required if the scanner breaks down - to replace it. For proper and long-term operation, it is also important to configure Touch ID correctly.
Re-registration of touch ID
This method eliminates the problem when the OS update does not work in any way despite any attempts to solve the problem. Following the instructions, it is possible to fix:
- Go to Settings and select “Scanner and passcode”, then write the password.
- Turn off features like iTunes Store and Apple Store, iPhone Unlocking, and, if you're a heavy user, Apple Pay.
- Return to the main screen, then hold down the Home and On/Off keys at the same time until the Apple logo appears on the display. After these manipulations, the device will automatically reboot, this will take no more than a minute.
- Do the first step again.
- Re-enable those sections that were disabled in the second paragraph.
- Update the pattern - this is important, as the old ones will automatically be erased.
When the operation is completed, the device will function as before, and the problem notification will no longer appear from time to time.
Don't use tempered glass on Galaxy S10!
Early feedback shows the tempered glass screen protector doesn't work well with the Galaxy S10.
So, if you have installed a tempered glass screen protector on your Galaxy S10, this is most likely the only reason why you are facing problems with the Galaxy S10 fingerprint sensor.
So, we recommend that you remove the tempered glass immediately.
Well, unless it's certified .
Currently, Samsung recommends using Whitestone's tempered glass screen protectors for Galaxy S10 devices as they have customized their product to work well with the Galaxy S10 and its new technologies.
