Touch screen A smartphone provides the user with much more control over the phone than a regular phone with physical buttons.
But, unfortunately, failure of touch buttons is not such a rare occurrence, and in terms of reliability they are in no way superior to regular buttons. Find out what to do if they don't work touch buttons in a smartphone and why this happens.
The simplest reason is dirt.
The sensitivity of the sensor in a smartphone directly depends on its cleanliness. If you touch the screen with dirty hands, dirt particles stick to the glass and then reduce the sensitivity of the sensor until it fails completely.
To return the touch buttons to their normal state, just wipe the screen with a damp cloth designed specifically for cleaning monitors. You can prevent frequent screen contamination by using protective film, which will not only protect against unwanted substances sticking to it, but also protect against scratches and small cracks.
Inaccurately applied film
Applying a protective film is not an easy task. There should be no air bubbles left underneath, otherwise some touch buttons will not be able to fully function.
Many phone owners decide to stick the film on themselves, but are subsequently forced to contact service specialists about this, since due to poorly pasted film, the sensitivity of the sensor deteriorates and the buttons do not work.
Temperature imbalance
Failures of touch buttons due to inappropriate temperature are most common in winter, when the thermometer drops below 10-15 degrees below zero. The phone's LCD screen is sensitive to low temperatures and may stop functioning as required if it gets too cold.
If the exposure to low temperatures was short-lived, after warming up the phone itself will quickly return to normal operating performance.
The touchscreen has moved or is peeling off
If the phone is used in hard mode, and its owner constantly exposes delicate equipment to various negative influences, Touchpad, or touchscreen, may peel off from the screen in some places. If this happens at the bottom of the smartphone screen, the functional touch buttons may stop working. 
To get rid of this problem, you should warm up the touchpad with hot air to soften the special glue that attaches it to the screen. It is better not to try to do this yourself, so as not to worsen the situation even further. Contact specialists from service center who have the experience and necessary equipment for such manipulations.
Software glitch
If the touchpad is sparkling clean, and even the most careful inspection does not show any damage, but the touch buttons still do not work, there may be a malfunction software smartphone. Reboot operating system by turning off the phone and then turning it on again.
This simple step usually eliminates occasional errors. If this does not happen, remember - perhaps before the touch buttons failed, you installed a new application or updated one of the already installed applications. Sensor failure can be caused by a software conflict between old and newly installed utilities. Uninstall the new application and restart your smartphone - it is possible that the touch buttons will restore functionality.
Viral infection
The widespread use of smartphones has drawn the attention of hackers. writing viruses, for this software segment. Today, antivirus on a smartphone is the same essential piece of software as on a regular computer.
If you don't have antivirus protection, it is possible that the failure of the touch buttons is caused by actions malware. Download good antivirus and scan your phone, then mercilessly delete all files that seem suspicious.
Reset
If none of the above measures work, you are left to try the last remedy that is available. to the average user. Reset your phone to factory settings. 
If the failure of the touch buttons was caused by any software reasons, as a result of the reset, all errors will be reset, along with your personal settings, application updates, and even the applications themselves installed while using the phone. After the reset, the functioning of all elements of the phone resumes in the vast majority of cases.
Custom firmware
If you have installed so-called custom firmware on your phone, you should be aware that from now on the manufacturer is not responsible for its performance.
Often the consequence of such actions is failure of some functions. What’s most offensive is that you don’t even have anyone to file a complaint with. The only way out is to return to the factory firmware, which can be downloaded from the website of your phone manufacturer.
If your touches are already producing the desired effect, if the response time has increased so much that it is visible to the naked eye, if the phone has begun to perform commands inadequately, it’s time to ask yourself how to fix the sensor on your phone. In principle, this is either done very simply, or it is not possible in principle and you are faced with the need for a complete replacement. But that's another story.
There are a number of identifying signs here so as not to be mistaken:
- Problems grow gradually, perhaps in a stepwise manner;
- The sensor is equally awkward in all parts of the screen;
- There were no strong shocks, falls into water, extreme temperatures or changes;
- There are no cracks or damage, or they appeared later.
Be that as it may, ideally it is still worth carrying out diagnostics in order to be sure of the type of failure.
How to fix the sensor on your phone at home, having experience?
The main rule in this case will be careful preparation of the workplace and the necessary tools. The order of work here is as follows:
- You disassemble the case, remove the screen and free the sensor if it is not integrated;
- Clean the contacts, press the sensor contact to them, apply power and check the result;
- If you are lucky and everything works, we secure the contacts with a dielectric and perform the assembly;
- If not, we look for the problem further or ask for help.
All safety rules are simple and intuitive, so we won’t focus on them separately, but following them is vitally important.
How to fix the sensor on your phone with your own hands for the first time?
Don't panic, as stated in the pages of the Guide. Everyone started at some point, and as a result, many of them became successful, which means you have a chance. Collect all the data about the device, watch repair videos, find aspects you don’t understand and clarify them. If you feel ready, start. In the end, if you do not take information that can be sent in advance, you only risk money, and this loss is not irreparable.
The sensor is not such a complex and delicate module that only a select few can easily repair it. When you turn to professionals, you will receive a guaranteed result, no worries, and the costs will not be critical. You can independently work with phones of any brand and model whose design you know. There is no clear answer as to which is easier: restoring a time-worn classic mobile phone or a modern modular smartphone. One thing is certain - may the one who walks overcome the road!