iPhone se touch ID not working

Touch ID does not work well, how to set up

The fingerprint sensor in the iPhone appeared in 2013 and has always accompanied and accompanies the models iPhone 5S, iPhone 6/6, iPhone 6S / 6S, iPhone SE, 7/7, 8/8, iPhone SE 2, as well as iPad Mini 3, iPad Mini 4, iPad Air 3, iPad 2017, iPad (2018). The Touch ID sensor was replaced in 2017 by Face ID. However, Face ID has not completely supplanted the Touch ID sensor yet. It is present on iPhone SE 2, iPad and iPad mini.

The Apple Lab service center is often contacted by users with the problem of a poorly responding fingerprint sensor. In this case, most often we are talking about relatively young models, where the sensor is built into the touch button Home.

Why Touch ID doesn’t work well on iPhone

As our practice shows, this problem rarely comes to hardware repair. In most cases, the issue can be resolved by setting up iOS. The touch ID fingerprint is configured the first time you start iPhone. Not all users make this setup with full responsibility. In most cases, it is done quickly, superficially. When scanning a fingerprint, the phone does not hold the same way as it does with subsequent use. Therefore, the reading of biometric data is incorrect, which causes a failure and the system requires you to enter the Apple ID password. A perplexed user runs into the Apple Lab with a “broken iPhone” creak. But you can solve the problem without leaving your home. Below we will tell you how to do it.

iPhone Touch ID Not Working! �� [5 FIXES!]

Touch ID on iPhone does not work correctly: reasons and how to set up

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How to set up the Touch ID fingerprint scanner on iPhone and iPad

If the identification sensor does not work well on an iOS device, you need to do the following:

  • Go to “Settings”, “Touch ID and Passcode”.
  • Here, all user biometric data will be referred to as “Finger 1” “Finger 2” and so on. We delete all existing prints.
  • To do this, select the existing print and click “Delete print”.
  • After that, select “Add a fingerprint”.
  • Now, before starting to scan a new fingerprint, hold your iPhone or iPad as you would normally hold the device while unlocking.
  • Then go through the standard procedure for taking prints:
  • two prints of the thumb of the right hand;
  • two prints of the left thumb;
  • once the print of the index finger of the right hand (for right-handers) and left (for left-handers).

Thus, biometrics are removed for all unlocking options. If you wish, you can experiment and find the most optimal options for yourself. Reconfiguring Touch ID solves the problem of a poorly responding sensor, but it is not a panacea. Sometimes, in order to restore the sensor to work, it is enough to update iOS or restart the phone.

If none of the above methods helped to solve the problem, then come to us, to the Apple Lab service center.

Touch ID does not work in the App Store

This is also a notable problem. Most often, the reason that the scanner stops working with the App Store is also a cosmetic factor, but often the problem occurs due to software malfunctions. Some users complain that since iOS 8.3, Touch ID is simply not displayed in the App Store.

In such and similar cases, we do the following:

  • click “Settings”. “Touch ID and Password”;
  • in the “Using Touch ID” section, disable “App Store, iTunes Store”;
  • restart the iPhone (or iPad);
  • we return to “Settings” again. “Touch ID and Password” and turn on “App Store, iTunes Store”.

After that, the Touch ID bug in the App Store should resolve itself. We also remind you that if you haven’t made any purchases in the App Store within 24 hours, the system will ask for a password at the entrance.

Touch ID not working. crash

If Touch ID fails, then a simple reconfiguration is recommended to deal with this nuisance. In other words, you need to retrain your iPhone (or iPad) to recognize your fingerprint. Since the advent of scanners, Apple has regularly updated their software so that smartphones and tablets of users remember the “fingers” of their owners longer and better.

It seems like a radical optimization was carried out back in iOS 8, but, as practice shows, if you do not refresh the print, then over time (from a month or longer), Touch ID fails anyway, but it happens. The reasons can be very different, but, as a rule, they are purely cosmetic in nature: slight “wear” of the print itself, dry skin of the finger, etc.

Therefore, if Touch ID suddenly malfunctioned, then first update the fingerprint in the memory of your smartphone or tablet. But first, you should carefully wipe the surface of the scanner and wash your hands. Next, go to “Settings”, then. to “Touch ID and Password”. We delete old prints by swiping across the screen from right to left. After that, we tap “Add a fingerprint” and re-carry out the standard procedure for entering a fingerprint according to the instructions.

If Touch ID Doesn’t Work on iPhone or iPad: How to Deal with the Problem

Touch ID is the official name for the fingerprint reader, which is equipped with smartphones iPhone 5s, iPhone 6 and iPhone 6 Plus, as well as tablets iPad mini 3, iPad mini 4, iPad Air 2 and iPad Pro. Apple claims that the newer version of Touch ID is installed in the iPhone 6s and iPhone 6s Plus models, and on the forums, users claim that Touch ID often does not work, both the “old” and the new.

Touch ID is, of course, a useful solution, and not only from a marketing point of view, but also from a purely practical one.

Users can use it to unlock their iPhones and iPads, log into accounts in various online services, and even pay for purchases using Apple Pay.

But only if Touch ID works fine. But, unfortunately, like any other electronics, this one is also sometimes capricious. Therefore, let’s figure it out.

To begin with, we note that if problems with Touch ID on your Apple device began after a recent update of its operating system to iOS 9 and / or even newer versions of it, then, most likely, a downgrade may be needed (i.e., a rollback of the system to the previous version), or, if the problems are not so critical, then it is better to wait for the next update.

With other problems of the fingerprint scanner in iPhones from 5s and newer, as well as in iPad mini 3, mini 4, Pro and Air 2, you can try to figure it out, so to speak, on your own and even at home. Fortunately, there are not many such problems, and the ways to eliminate them are already known. So if:

Touch ID doesn’t work at all

Of course, the likelihood that the fingerprint scanner is out of order also exists. Although users complain about such breakdowns relatively rarely. If, after updating the fingerprint, Touch ID did not work properly, then you can try “Hard Reset”, having created a preliminary backup. If the problem is programmatic, then a hard reboot should fix it. Otherwise, you will have to visit the service center, since it is unlikely that you can do without qualified diagnostics.

Touch ID does not work in winter or in cold weather

Statistics show that in low temperatures, the fingerprint scanner in the iPhone and iPad is more likely to fail. The problem, again, in most cases has a simple explanation. The fact is that in cold weather the papillary pattern of the fingers changes. It is difficult to notice these changes with the naked eye, but Touch ID notices them and starts to malfunction. As you probably already guessed, a nuisance is also treated by updating the fingerprint. But you can do even easier and enter a special “winter” print into the device’s memory. scan your finger pattern immediately from the cold. True, they say that both methods only partially solve the problem, but it’s still worth trying.

Touch ID doesn’t work when it’s dirty or wet

Well, there’s really nothing to explain here. It is clear that moisture or dirt (whether it is on the skin of the finger or on the surface of the scanner) is very effective in preventing any fingerprint from being scanned. Therefore, if the scanner has excess substances of a wet and / or dirty look, it is better to wipe it with a dry, clean cloth. And you need to wash your finger (you can even wash it with your hands). However, you should not overdo it with water, because if you keep your hands in water for a long time, the fingertips will wrinkle and the papillary pattern will change for a while. Apple claims that in the new iPhone 6s and iPhone 6s Plus, Touch ID works better with wet skin, but still the manufacturer does not recommend using the scanner with wet hands.

Flashing or System Restore

Reboot your device to completely erase all software and start from scratch.

Make sure you back up your data. All your apps, photos, videos, etc. will be deleted during flashing.

Touch ID not working on iPhone

Delete and Add New Touch ID Fingerprints on iPhone / iPad

When you constantly have a problem with your fingerprint, it is better to delete the old one and install a new one. If you can’t activate Touch ID. do the following.

Step 1. Delete Touch ID Fingerprints on iPhone / iPad

Scroll down and select “Touch ID & Password” in iPhone Settings. Enter your password when prompted. Then select any fingerprint you added earlier and click the Remove Fingerprint button. Repeat the above operations until you have deleted all previous fingerprints on iPhone.

Step 2.Resetting and re-adding Touch ID

Find and tap the Add Fingerprint button to set up a new fingerprint using the on-screen instructions. It will guide you in detail for every step you need to take.

Force reboot

An effective method in the treatment of minor errors in iOS software / Does not erase information and settings.

Reboot iPhone 12 pro / 11 / XS / XR / X / 8/8 Plus.

  • Press the volume up button and then quickly release it.
  • Press the volume down button and then quickly release it.
  • Next, hold and press the side button until the Apple logo appears.

Hold the side volume down and power buttons without releasing them for at least 10 seconds. until you see the Apple logo.

Force restart iPhone SE, 6, 6s, 5s, and earlier iPhones: Press and hold the Home and Top (or Side) buttons for about 10 seconds until the Apple logo appears.


The Touch ID problem may be a software bug. A reboot will help remove some system errors that may have been the cause of the breakdown. There are 2 options for a simple reboot.

  • Go to Settings Touch ID & Passcode and turn off any options you see. Then restart your iPhone and re-enable the desired Touch ID features.
  • Delete the existing fingerprint and restart the device. When the iPhone turns on again, register a new finger. Initial Touch ID setup may not complete successfully.

DFU mode

This is the very last, but at the same time, the most effective way to restore your phone, by completely flashing your iPhone. This method will delete all data on your phone and reinstall the system. But at the same time it will help to remove most of the software errors.

  • Connect iPhone to PC using iTunes.
  • Press the Power and Home buttons at the same time, as in a reboot, and hold them for ten seconds.
  • Release the power key, but hold “Home” until iTunes displays a message about entering the smartphone into DFU mode.
  • Follow the instructions on the screen to reset iPhone settings.

Unlike the Recovery mode, the DFU works with the screen off, on which no icons are displayed. During the firmware update from the iPhone, a full factory reset will be performed and all data will be deleted: we recommend that you make a backup copy of the information on your iPhone. After rebooting in DFU mode, you will have to re-enter your Apple ID and adjust the settings for the iOS operating system.

If none of the above helps and you can’t fix the problem with Touch ID? That is most likely a hardware failure. Contact a service center for iPhone diagnostics and repair.

Check for damage if you’ve repaired iPhone yourself. For example, if you replaced one of the cameras or other hardware and now Touch ID does not work, you may have damaged the flex cable, connector, or anything else that Touch ID needs to work.

Recover iPhone in Recovery Mode

If the problem persists after trying to reboot, let’s proceed to more radical methods. For starters, you can update to the latest firmware and restore your iPhone. This will not delete your data, but it can throw off errors caused by a crash.

  • Connect iPhone to computer via USB. using Lightning wire.
  • If you have an iPhone 7 or older, press the Power and Volume Down buttons at the same time. If the older iPhone is the Home key and Power On.
  • Wait for the notification that the smartphone is put into recovery mode, and follow the advice on the PC screen.

Update your device.

This could be a bug or other issue with Touch ID that Apple has already addressed with a new iOS update.

Touch ID does not work. iPhone SE.

Very often in the secondary iPhone market, you can find advertisements for the sale of iPhones with a non-working Touch ID. as a rule, much cheaper than similar phones with a working Touch ID function. Touch ID. fingerprint reader function. The scanner is located in the Home button. In the event of a button breakage, simple replacement will not restore finger reading. This is due to the fact that the button itself contains a microchip with a stitched serial number of the phone. It is impossible to get around this, since there is no software for flashing the button. Even large Chinese companies involved in iPhone restoration, which have invested large sums in their business and have revealed many of Apple’s secrets, cannot find the algorithm for flashing the Touch ID button. In most cases, repairing the Touch ID function is either impossible or very expensive. Therefore, the price of such iPhones is lower.

There are three main reasons for touch ID failure:

  • Breaking the loop of the Home button. repair is possible, success rate is 20%
  • Water penetration between the button and the glass of the screen. repair is possible, success. 50%
  • Faulty motherboard. repair is possible, success is 95%

It is very rare to restore the Home button loop due to the small size of the loop itself. Very thin paths are difficult to splice, and if successful, such repairs are short-lived in practice. Water entering the Home button can damage the chip inside the button. Faults in the motherboard are often localized and eliminated.

An iPhone SE phone with a non-working Touch ID got into our workshop. Previously, this device was repaired after a serious fall, a modem was rolled over. a microcircuit responsible for cellular communication. After the repair, about a month later, the fingerprint began to not respond periodically. Diagnostics showed the normal state of the loop, but there is no signal from the U4040 microcircuit, it must be removed for further verification

iPhone SE. Touch ID does not work. When I turn on my phone, I get a message stating that Touch ID cannot be activated on this iPhone.

IPhone SE diagram. Home button power supply chip. Break from the connector of the button to the penny A3.

We remove the microcircuit with a soldering station. We see a cliff of important dimes.

Under the microscope, we solder thin wires imitating tracks.

We clean the microcircuit, roll new balls and solder it into place. Photo through a microscope. Chip size 1.5×1.5mm.

We turn on the phone, lo and behold, the “Add fingerprint” item is active.

The finger is read normally, the repair is done.

Stanislav Buibarov Senior specialist of the workshop “Repair of telephones on Zaraiskaya”

Renewal of touch ID

This method eliminates the malfunction when the OS update does not work in any way with any attempts to solve the problem. Following the instructions, it is possible to fix:

Enter the Settings and select “Scanner and passcode”, then write the password. Turn off features like iTunes & Apple Store, iPhone Unlock, and if you’re actively using Apple Pay. Return to the main screen, then hold the “Home” and “On / Off” keys at the same time, hold them down until the Apple logo appears on the display

After these manipulations, the device will automatically reboot, it will take no more than a minute. Do the first step again. Re-enable those partitions that you disabled in the second paragraph. Refresh the pattern. this is important, as the old ones will be automatically erased.

When the operation is over, the device will function as before, and the error notification will no longer appear from time to time.

If Touch ID stops working and it does not recognize your fingers, then you should use other methods that are not as effective as the previous one:

  • Delete the old information in the settings section and install them again.
  • Reboot your device as described in the first method while the battery is charging. For some users, it worked, and everything started as before, despite the originality of such a solution.
  • Reset the basic settings on the device, if it is possible to save the necessary files and contacts. To reset, go to the main Settings menu, then “General”, “Reset all settings”. When all the steps are correct, restart the gadget.

In some cases, together with the fingerprint scanner, the Home key itself stops responding. As soon as fat layers from the hands, crumbs, sugary drinks and other impurities get into it, the key functions more on pressing. To fix the problem, it is better to use the WD-40 aerosol, which does an excellent job. At the same time, it is worthwhile to carefully handle not only this liquid, but also the screen.

If too much liquid gets on the mobile phone, other malfunctions will appear on the device. Once the chemical has been applied, the key must be flicked multiple times for it to penetrate underneath. Then the cleaning agent will get rid of dirt and not only the key, but also the touch ID will come back to life.

What to do if your fingerprint stops working on iPhone

If the problem is of a hardware nature, there is nothing you can do about it. But if it is software, you can try to reanimate the scanner yourself. Or at least exclude the second option as such.

Activating Touch ID through Settings

While the iPhone is still not locked, you can try manually activating the sensor. For this:

If it was a normal system failure, the manipulation data will be enough to get the sensor working again as expected.

Deactivating touch ID in gadget settings

What to do if updating fingerprints doesn’t help

If you followed the instructions described above, but did not manage to get rid of the problem in question, there are some more tips on how to fix the error:

If none of the above methods helped to 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 that has arisen. Another way is.

It is worth noting that if you contact the official Apple service center with this problem, you can hear 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 on your own and try to “fix the loop of the Home button”, which is advised to do when the error “Can’t complete the Touch ID setup” is advised by various “craftsmen”.

Currently, fingerprint scanners are installed on iPhones, iPads. Often this scanner malfunctions. Then the user sees an error message:. “Can’t complete the Touch ID setup, go back and try again”.

This failure is most often fixed by a simple reboot of the mobile device. To reboot, you need to click on the Hard Reset button. Many users note such a feature when only rebooting on charging helps.

That is, in order to get rid of the problem, you should put the phone on charge. When the phone starts charging, restart the device. After that, as a rule, in most cases, the problem disappears.

In addition, the problem with the scanner will disappear after a planned system update. But who wants to wait for the iOS update? Of course, I want to fix the glitch immediately after its manifestation.

Inoperative function: defective or improper operation?

Undoubtedly, but what to do if Touch ID stopped working or it does not work initially? There may be several reasons for this:

Domestic reasons (incomplete coverage of the button with a fingertip, contamination of the sensor, and even other). It should be noted that most of the complaints that Touch ID does not work well fall into this and the next category. Just a “glitch” of the recognition program. In this case, it is better to enroll the other fingerprint. Unfortunately, there is also such an option as marriage. Indicator of such a situation. no effect from device reboot and scanning error

And it doesn’t matter if the marriage was admitted at the production stage or by a crook-seller who assembled one iPhone out of two without taking into account the binding of the Touch ID sensor to “his” processor, the phone will still have to be taken to the service center.

With customizable actions, the features in each app are more than covered by convenience, speed, and streamlined shopping processes. Although the likelihood of a marriage that can bring trouble is not excluded.

Touch ID is a unique fingerprint reader technology. It is equipped with such versions of Apple’s mobile gadgets as iPhone 5s, iPhone 6 and iPhone 6 Plus. According to the manufacturer, this technology is more advanced in the models of the sixth line. However, on the forums, many users often complain that Touch ID is a rather poorly working element in both the first and second versions.

Touch ID is definitely a good idea. And not only in terms of marketing, but also for practical use. Using Touch ID, the owner of the iPhone can unlock his device, enter the accounts of some programs on the network, and make a payment using Apple Pay. But this is in the event that the technology functions smoothly, which is not always the case. As with any electronic mechanism, Touch ID sometimes has problems too. How to deal with them? Let’s figure it out.

First, if problems were discovered after a recent firmware upgrade to version 9 (or more recent iOS versions), you may need to upgrade. This term refers to a rollback of a system to a previous version. But if the problems are not so significant, the best solution would be to wait for the next update.

All other problems are often caused by misunderstandings that do not imply anything serious. Therefore, the user can solve most of them on his own, without contacting a repair shop. over, there are not so many such problems, and the ways to solve them have long been known. This article will look at each problem and how to solve it in detail.

It often happens that the fingerprint does not work on the iPhone 6 or iPhone 5S. If the system has malfunctions, experts recommend making a simple reconfiguration. In other words, you need to retrain the gadget to recognize the fingerprint. When the first scanners appeared, Apple took care of annual software updates for them. This is done so that the devices remember the fingers of their owners as best as possible.

Significant optimization in this area was carried out in the eighth version of the operating system. But as the practical experience of many users has shown, if the print is not regularly refreshed, after about a month, Touch ID will start to malfunction. The reasons for this are usually the most commonplace, but at their core they are cosmetic in nature (the print is worn out, dry skin of the finger, and similar misunderstandings).

Considering the above, with Touch ID glitches on the iPhone 5S, you need to update the fingerprint in the gadget’s memory. But before the procedure, you must wipe the display surface well and wash your hands. Then you should go to the iPhone settings, and after that. to the Touch ID password section. In this case, the earlier fingerprint must be removed via a swipe, moving along the display from the right side to the left. After this action, you need to click on the button for adding a fingerprint and again carry out the usual operation for entering a fingerprint, in accordance with the instructions.

Touch ID Stopped Working. How I Solved This Problem!?

Hello everyone! As has been repeatedly noted on the blog, all articles are those problems or questions that either I myself or my acquaintances have encountered. Actually for this, the site was created. to share personal experience and help others with the “apple” technique. And now, my already quite old, but still working iPhone 5S “threw” me another idea for instructions. its Touch ID suddenly stopped working.

And, as it seemed to me at the first moment, it happened finally and irrevocably. No, but what else can you expect? The device is far from new. Chips, scratches, scuffs, falls. all this was and is. Natural wear and tear of the device. there is no escape 🙂 Therefore, when the Touch ID “fell off”, I was not very surprised. Surprise came only later, in the process of solving this problem however, let’s talk about everything in order.

  • I upgraded to iOS 10.3.1
  • After some time, I began to notice that the sensor for unlocking does not always work. But as usual, I did not attach any importance to this. maybe the hands are dirty or something else.
  • But after I could not enter the client bank by fingerprint, in my head “solitaire” was formed. Touch ID does not work.

Looking ahead, I will note that everything was resolved safely. But what actions had to be taken for this?

It is worth noting that if your iPhone has a non-native Home button (for example, replaced after repair), then Touch ID will not function on it. Never. The fingerprint sensor is hard-wired to the motherboard. One board. one Home button. Also, some sellers immediately sell an iPhone with an inoperative scanner. I already wrote what kind of devices they are.

But our problem is different. the iPhone stopped recognizing the fingerprint, although nothing happened to it (except for the iOS update).

I thought it was a simple “glitch” of the system and did this:

  • To begin with, I forcibly performed a hard reboot. it’s very simple. And in some cases it helps to get rid of system crashes. But not at this time.
  • Opened “Settings. Touch ID and Passcode”, deleted the old fingerprint and tried to add a new one. There were no problems with the removal, but at the stage of adding a new one, the scanner simply did not read my finger and showed a white screen. Sometimes adding an inscription. “You pressed the button. Place your finger on the Home button without pressing it “.
  • Well, I think things are really bad. we need to do a firmware restore. Backed up and recovered

And here, it would seem, everything should end. But no. the miracle didn’t happen and Touch ID still didn’t work. After that, it became clear that the problem was “iron”. And it consists in the loop of the Home button:

  • It may be damaged (moisture, careless assembly or disassembly of the device).
  • It may simply not be inserted (not fully installed).

And it seems that this is not my case. I did not wet the iPhone, and since the last disassembly the scanner worked fine

But all the same, the device had to be disassembled and this is what happened:

  • I took apart the iPhone.
  • Disconnected the loop of the Home button.
  • Looked at him and, as expected, saw nothing. he is in perfect condition.
  • Put it back.
  • Touch ID is working.

Honestly, the result I got surprised me a little 🙂

I don’t know why a simple reconnection of the loop helped, but the fact remains. after this operation, the button began to process my fingerprints normally.

Although I have one idea why this could happen. lately my iPhone has dropped several times (and quite hard). I already thought that it would come to replacing the screen, but in the end well, everything worked out. And, perhaps, it was these falls that caused all the malfunctions that were described just above.

Touch ID does not work well on the iPhone: how to properly configure the fingerprint sensor in the iPhone

The Touch ID fingerprint sensor on a fairly fresh iPhone does not always work on touch and you have to constantly be asked to enter the password? If you are faced with a similar problem, then in this article we will tell you how to fix it.

Everyone knows that after buying a new iPhone, you need to complete the activation procedure and the initial setup of the device, which includes setting up the Touch ID fingerprint sensor built into the Home button. The user is asked to add a fingerprint with which the iPhone can be unlocked.

From our many years of observing users setting up a new iPhone, we can confidently say that adding a fingerprint to Touch ID during initial device setup is often very quick and not always with an understanding of the process. Most users hold their iPhone quite differently while adjusting the biometric sensor than during normal use. This is the whole secret.

In addition, after the initial setup of the iPhone, few people return to the Touch ID options (in the iOS settings) to continue the process of improving the sensor. As a result, users continue to use the only fingerprint that was recorded in Touch ID when the iPhone was first set up. But in the parameters of the sensor, you can add as many as 5 prints. So…

Touch ID works poorly on iPhone: how to properly configure the fingerprint sensor in iPhone or iPad

Open the Settings app on your iPhone or iPad and go to Touch ID & Passcode.

Delete all added fingerprints. To do this, select each fingerprint and click Delete fingerprint.

Hold your iPhone or iPad the way you would normally hold the device before unlocking.

Follow the procedure for adding all five prints as follows:

  • add the thumbprint of the right hand twice;
  • add the thumbprint of the left hand twice;
  • add the print of the index finger of the right hand (if you are right-handed) or of the left hand (if you are left-handed) once.

The point of this operation is to add more fingerprints to the most used unlocking option.

The scheme proposed by us, if desired, can be changed. For example, if you always unlock the device with one hand, then it will not be superfluous to add 3, 4 or even all 5 possible fingerprints to the Thumb.

Try it now. In the vast majority of cases, this will solve the problem of poor performance of Touch ID.

In case the sensor still does not respond well after completing the fingerprint adding procedure, try restarting the device. If the reboot did not help, then two options remain. either you are the owner of hands with an abnormal fingerprint structure (we have met such users) or the problem is still in the Touch ID sensor itself.

Why Touch ID Doesn’t Work After Repair

Touch ID has become one of the major innovations in the iPhone 5s and, along with the 64-bit processor architecture, has set the trend for manufacturers around the world. Since then, there have been three generations of iPhone with a fingerprint sensor. Naturally, many of them managed to go through fire and water, as well as repairs in unofficial service centers. Explain why the fingerprint scanner may stop working after iPhone repair.

First, you need to figure out how Touch ID works and why repairing it is an almost hopeless task.

iPhone Se 2: Fix Touch ID not Working on iPhone| iPhone Touch ID Problem Solved

The Home button on the new iPhones is a high-tech sandwich. Scratch-resistant sapphire glass protects it from mechanical damage. It is surrounded by a special metal ring that responds to touch and triggers a CMOS sensor located under the glass, which acts as a lens. Scans a unique design on the ball of the finger at a resolution of 500 pixels per inch.

Then a 64-bit processor comes into play, which compares the scan with those mathematical images of fingerprints that are stored in the Secure Enclave designated for this. This is a special coprocessor integrated into Apple A7 and subsequent generations of systems-on-a-chip. When manufactured, it receives its own identifier (UID), which is not available to any system component and even Apple itself. the processor does not read fingerprints, but simply transmits packets of information to an encrypted memory area that uses the Secure Enclave. The Touch ID sensor communicates with the processor via the serial peripheral interface bus. it is its damage that disables the biometric sensor.

Simply put, partial damage to the loop between Touch ID and the phone board prevents the iPhone from authenticating the fingerprint, after which the smartphone deactivates the biometric sensor. In this case, it is not possible to replace individual components to restore functionality, since the identifiers will not match between the third-party sensor and the Secure Enclave. It is impossible to completely restore the damaged train. it consists of ten multi-layer tracks, each of which does not exceed a tenth of a millimeter in thickness. But the mechanical elements of the Home button, which are responsible for registering pressing, are quite possible to replace. But from now on, you will have to unlock the device exclusively with a password. It is easy to find a broken Touch ID in the settings. the menu for adding new fingerprints will be displayed in gray.

The only way to get a working fingerprint sensor is to use the “donor organs” of another smartphone. We’ll have to install a new motherboard and replace the Home button. However, the cost of such an operation is comparable to buying a new iPhone, which will need to be gutted.

Since the release of iOS 9, many iPhone 6 and iPhone 6 Plus users who have gone through the Home button repair have suffered from Error 53. It signals that the fingerprint module did not pass the security check and the smartphone became a “brick”. The error appeared during the update, and there was simply no solution. only the return of the original components to the device. In iOS 9.2.1, Apple brought back the ability to update devices. However, this support forum thread has received over 200,000 views, indicating the magnitude of the problem.

What to do if Touch ID doesn’t work on iPhone. How I solved this problem on iPhone 6S Plus

Last week, they asked to see why Touch ID suddenly stopped working on the iPhone 6S Plus, with which fingerprint unlocking occurs. In the settings, on the “Touch ID and Passcode” tab, the previously entered fingerprints were not found, and the function of adding a fingerprint itself was not active. This behavior of iOS did not bode well for the owner and clearly indicated a hardware problem. However, everything ended well. but let’s, in order.

Why is Touch ID broken??

There are breakdowns that cannot be fixed in regular services. I will say more. Not all Apple Authorized Service Providers have the required hardware. Such breakdowns, first of all, include the replacement of the Home button starting with the iPhone 5S, that is, those devices where there is a fingerprint scanner.

If you wish, you can replace it yourself, but you won’t be able to keep the Touch ID working. The fact is that Touch ID is tied to the processor of the device and is unique for each phone. You can perform the necessary calibration after replacing the Home buttons only with the help of a special device Horizon Machine, which Apple provides to official service centers (in theory, they should be in each, but not a fact).

So, it is useless to solve the problem with a non-working fingerprint scanner by flashing or restoring the device from a backup. the miracle will not happen. Most often, a similar problem occurs due to physical damage to the Home button cable (moisture, inaccurate assembly / disassembly of the device), or the cable is simply not fully installed during assembly.

As it turned out, the latter. exactly my case. It turned out that the problem with Touch ID appeared after replacing the battery in one of the unofficial services. Having disassembled the phone, it turned out that the home button cable was not fully inserted into the connector.

Having reconnected the cable, at the same time I checked the integrity of the cable itself (on the iPhone 6 / 6S, it is not uncommon for them to break at the base of the button). If you decide to climb inside the device yourself, before disconnecting any cables, turn off the phone and disconnect the battery cable. These are not pleasant moments thanks to the curvature of some masters.

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