One of the common diseases of older Apple smartphones (iPhone 8 and earlier) is Touch ID breakage.
Broken or broken button becomes a serious problem as the fingerprint scanner tied to native motherboard and when replacing the button, it will just refuse to work.
Let's figure out together what types of breakdowns occur most often and how you can fix this or that situation.
Replacing the Home Button Mechanism
Each physical button has its own resource for the number of operations. So active users of the iPhone 5s / 6 / 6s could well surpass it.
A broken button works poorly or doesn't work at all. The sound of pressing is not heard, and the action in the system may not be performed.
If the top panel of the key is not damaged and the Touch ID is working properly, the button itself can be replaced.
Starting with the iPhone 7, the developers abandoned the physical key in favor of the virtual one and this problem has ceased to be relevant.
How much does the repair cost: repair of a worn out pressing mechanism is possible on iPhone 5s / 6 / 6s / SE and will cost 1000-1500 rub.
The procedure will take up to 30 minutes.
Touch ID loop recovery
A much more common breakdown is a broken cable that connects the button and scanner to the smartphone's motherboard.
On a train one and a half centimeters wide, a dozen thin tracks were placed and covered with a protective insulating layer.
If the cable is not laid correctly, vibrated frequently or dropped, the cable may break. This can even happen from natural wear and tear of this part.
It is almost impossible to replace the cable, but it is difficult to restore, but real. Many masters undertake a similar procedure and perform it quite efficiently.
Recovery is only carried out if the Touch ID sensor itself is working properly. Otherwise, it is easier to replace the entire button with the loss of fingerprint scanner functionality.
How to repair: Repairing the Touch ID loop takes on average an hour and a half, but not every service center undertakes it.
The procedure will cost from 3000 (for iPhone 6) before 6000 (for iPhone 8) rubles.
Replacing the entire button entirely with the loss of Touch ID functionality
While it is possible to replace the damaged module on iPhone models with a physical button, albeit with the loss of the fingerprint scanner, such repair is not possible on iPhone 7/8 models.
The button is touch sensitive and when a non-native component is installed, it is simply not recognized by the device. Will not work both Touch ID and the Home button itself.
The ubiquitous Chinese have found a solution to the problem. Here is such a thing from AliExpress that can help in a similar situation.
Our reader has already made a similar decision and is very pleased with it.
At first glance, this is a Chinese button, which is installed instead of the original one on old iPhones with a physical key.
This button is also physical (it has a pressable movable button), but with a built-in Bluetooth module. How do you like that?
The key is connected instead of the original one, and after installation it connects to the smartphone via Bluetooth. So pressing the button is perceived by the system as pressing the Home button and allows you to go to the main screen, launch the ambiguity panel and take screenshots.
How to repair: buttons like JC home already offer to install in many unofficial service centers. A similar device can be ordered on ALiExpress and just find an intelligent master to replace it, or pay RUB 1500-2000 in the service.
What can be done without renovation?
As a temporary solution, one of the iOS tricks can be used - AssistiveTouch... This is a virtual button on the smartphone screen, to which you can assign several desired actions at once.
To enable, follow the path Settings - General - Accessibility - AssistiveTouch and activate the main switch.
Below you can set the action of the button for single or double pressing, for a long press or 3D-Touch. In addition, some of the possibilities can be located in the menu that appears after pressing the button.
So you can do without a broken Home button for a while.
A new feature from the iPhone 5s called Touch ID has caused quite a stir among Apple fans and their devices. However, now there are restrictions between users, because only owners of the latest iPhone 5s can use the fingerprint scanner, while other users are forced to continue using the standard lock button. The fingerprint sensor is currently only available to Apple. The principles of the company are still developing in this way: they do not want to give access to the new security system at the moment, as this could destroy the whole idea. Touch ID can now be used to unlock, authorize, and make purchases in the two iTunes stores and the App Store.
Today, one of the developers of jailbreak tweaks has come up with a novelty that will amuse some users and make an imitation of a fingerprint scanner on any iPhone. All that is needed for this is an iPhone on iOS 7 and an installed jailbreak using Evasi0n.
How to makeTouchIDon anyiPhoneandiPad:
- Go to the General Settings of the device, then go to the Password protection item and set it. This is a mandatory operation that is required for the tweak to work correctly.
- Make sure you have a jailbreak, if it is missing on your iPhone or iPad, then you definitely need to do it.
- Open Cydia, download a free tweak called Activator. If you don't want to search for it among the repository, then just enter the name of the tweak in the Search tab.
- After installing the tweak, click on the Respring button and open Cydia again. Now download and install a tweak called ByPass.
- Close Cydia and go back to settings. Now the Activator tweak tab will appear there.
- Open the "On the lock screen" section, then the "Home" button tab and fall into the Short hold item.
- Check the box next to ByPass
This completes the procedure. Now try to lock and unlock your device. When unlocking, a password window will appear in front of you. However, if you hold down the Home button for one quarter of a second, the device will automatically unlock. As a result, we got such a fun and convenient function for someone. We hope you enjoyed this idea.
Can't complete or can't complete Touch ID setup after iOS update? This guide has collected the most common Touch ID problems and solutions to help you.
If problems with Touch ID started immediately after updating to a new version of iOS, you may need to roll back it. As long as you have a chance or stay with the problem, until the next update is released. We've seen bugs appear in some iOS updates, and subsequent ones fix it.
While it may seem like a problem with Touch ID, there is a reason why your iPhone asks for a password more often after updating. If you haven't used your password for six days, and haven't entered Touch ID to unlock your phone for eight hours, you'll need to enter your password. This is Apple's rule and it is set for your safety.
How to fix the problem of unable to activate Touch ID on iPhone?
Regardless of whether you initially set the Touch ID incorrectly, or you think it becomes unreliable over time, there are all sorts of reasons why Touch ID on an iPhone or iPad might not be able to recognize your fingerprint as it used to, or as it should. ... Sometimes, in such cases, it is best to start over.
Unlock your iPhone or iPad and re-configure Touch ID to fix most errors. Before doing this, make sure the Touch ID sensor is free of dirt or sweat, and dry your hands.
Step 1. Settings → Scroll down and tap Touch ID & Password.
Step 2. Next, enter your password and turn off the iPhone Unlock and iTunes & App Store features.
Step 3. Press the Home button to return to the home screen and then restart your iPhone by pressing the Shutdown button.
Step 4. Settings → Scroll down and tap Touch ID & Password. Enter your password.
Step 5. Turn on iPhone Unlock and iTunes & App Store features.
If you are unable to complete the Touch iD setup using the above method, enable the Swipe to Open feature. To do this, follow the steps below:
Step 1. Go to Settings → General.
Step 2. Click Accessibility.
Step 3. Select "Home". 
Step 4. Turn on "Swipe to open".
After that, restart your phone and check if the “Can't complete Touch ID setup” crash is fixed.
Re-calibrating the Touch ID sensor
The easiest way to fix Touch ID errors is to recreate your fingerprint on iPhone. Over the past year, iOS updates have done a great job fixing most of the Touch ID bugs including "Can't set up Touch ID", and there are general performance improvements on iOS 8 and up as well.
This can help if your fingerprints have changed slightly over the past few months due to wear and tear, dry skin, etc. To do this, you need to follow these simple steps:
Step 1. Launch the Settings app and open Touch ID & Passcode, enter your passcode when prompted.
Step 2. Select the fingerprint you are having problems with, then click the Remove fingerprint button.
Step 3. Press the "Add Fingerprint ..." button to start rescanning the removed finger. 
Step 4. Apply your finger to the Touch ID sensor in different ways - from right to left, from top to bottom and to the sides, until the fingerprint icon is completely colored.
Step 5. When asked to set up a grip, scan the edges of that finger until the fingerprint icon is completely colored.
Note: Scan the front, back and sides of this finger in the way you think you will use it to unlock if you are not the most comfortable grip.
Step 6. Click the "Continue" button when the process is complete to save your fingerprint. 
Lock the device and make sure the fingerprint is working; Congratulations if everything worked out! If not, reboot the device following the instructions below and check if the problem is resolved.
Force restarting the device
The next option is a forced reboot. Hold down the Power and Home buttons at the same time for about 10 seconds and release when you see the Apple logo. These instructions are 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 the volume up, then the volume down and hold the Power button for 10 seconds. The rest of the process is the same.
After rebooting, your fingerprint should work fine.
If, after following these steps to recalibrate Touch ID, you still cannot unlock your iOS device with your fingerprint, something other than iOS errors may be present. Take these troubleshooting steps:
Wipe the Touch ID sensor with a microfiber cloth to remove fingerprints and dirt.
Use another finger; the finger you are trying to use may not have a pronounced fingerprint.
Note: According to reviews, many iPhone owners are faced with the problem "cannot complete the Touch iD setup." Apple official support says this is a hardware issue and should either replace the Home button (or screen + Home button) or the entire phone.
Conclusion
If the Touch ID issue continues to haunt your device, you should either wait until the next iOS update or contact Apple for help. Also, if your iPhone is still under warranty, contact an Apple Service Provider.
Touch ID is a great tool for authenticating in-app purchases using your fingerprint instead of the traditional Apple account password. This is a more secure form of user authentication, which also significantly speeds up the entire checkout process.
Unfortunately, nothing is absolutely perfect in this world. It happens that Touch ID does not quite work correctly with the AppStore when authenticating while making purchases. Instead of requiring the user to use a fingerprint for authentication, the App Store can prompt the user for a traditional password.
Don't worry if this situation arises. Below will be shown how to solve this problem.
What if Touch ID doesn't work in the App Store?
Step 1: Go to Settings on your iPhone or iPad and go to the Touch ID and Password section. If the function of requesting a code is enabled, then it can be requested.
Step 2: Disable iTunes & App Store.
Step 5: Enable iTunes & App Store.
After completing these steps, any attempt to make a purchase through the App Store, the user will need to use the Touch ID, and not the Apple ID password. It should be borne in mind that if purchases through the App Store have not been made within 24 hours, the device will still require you to enter your Apple ID password.
It happens that this problem occurs due to incorrect operation of the Touch ID equipment. That is why it is necessary to make sure that it is functioning properly. This can be verified by using Touch ID on the locked display to unlock the device.