It is very normal and common to find iPhone screen broken or water damaged. However, it is aberrant and strange if the screen doesn’t respond correctly to what you are actually making, or becomes completely unresponsive. Many iPhone X users represent that the screen is responding itself even though they do not touch the screen. And sometimes the screen doesn’t respond at all. The phenomenon is called ‘iPhone ghost touch’. In most cases, lock and unlock screen can temporarily solve the problem. However, what makes this problem become complex it occurs randomly and hardly preventable. So the question is, what causes iPhone X ghost touch in iOS 12?
When you place your finger on the touch screen, a low current will be drawn from the touch point. And the controller calculates will calculate the exact point of the touch point by calculating the ratio of currents on different electrodes (the current size is related to the electrode distance).
It can be seen that the correct touch of the capacitive screen is very sensitive to current stability. In general, what the phone battery powers is direct current having high stability. However, when we use inferior adapters and charging cables for charging, the capacitance and inductance will not meet the requirements. And the screen will be prone to interference under these ripples.
The ghost touch problem will be more severe in dry weather. In dry days, the screen may be covered with static electricity when the iPhone is taken from pocket, leaving the screen temporarily untouchable.
The chip welded to the phone's motherboard is not working properly. This is statistically more likely to happen with the iPhone 6.
Any non-original charger or accessory not developed by Apple may lead to the malfunctions on iPhone. If your iPhone is connected to a 3rd party charger, pull it off and switch to an original charger, and get it connected with your iPhone. Now click any side of the iPhone screen.
If your iPhone stills suffers from ghost touch after switching to an original cable, trying to reset and restart the device is another great chance to fix it. Hold down the power button and home button to turn off the device, release home button and keep holding the power button to turn it on. Now check whether the screen touch is back to normal.
If it doesn’t help, reset your iPhone to default settings is also worth trying. To reset iPhone settings, go to Settings on iPhone home screen, find General options, select it and click Reset, then tap on Rest All Settings. You need to enter the passcode to initial the process. And your iPhone will be restored to original settings.
Step 2. Plug your iPhone X into the computer using an USB cable, click Next.
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Step3. You need to check the device information, including to device model, iOS version detected by the program. Then click Repair to fix the ghost touch bug.
There might be a hardware issue of your iPhone X if the screen touching problem still hasn't been fixed via the methods mentioned above. You can take the iPhone to local Apple store to replace a new screen if it is still under warranty.