Summary
When a phone's touchscreen stops responding, it is usually caused by a problem with the digitizer, the physical part of the display that processes touch, or when the software stops communicating with the hardware correctly.
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To fix the issue, restart the phone, remove the screen protector, and dry out the device if it got wet.
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If the touchscreen is still unresponsive, try resetting the phone to factory settings.
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If none of these steps work, it is best to take the device to a professional for repairs.
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Summary
When a touch screen stops responding to touch, frustration can set in. There are a number of steps that can be taken to get things working again, from basic fixes like restarting the device, cleaning the screen, removing the case or screen protector, and drying out the device if it got wet. If the touch screen still doesn't work, it is best to take the device to a professional for professional repairs.
11 Steps to Fix Your Broken Touch Screen - Lifewire
lifewire.com
Summary
Restart your iPhone. The first thing to try should be obvious: restart your iPhone. Under the hood, your iPhone isn't that much different from a Mac or Windows PC, and you may have already encountered problems with those devices that are solved by a simple reboot.
Force restart your iPhone. Of course, if your touchscreen is acting up, you may not be able to move the power-off slider properly to shut down your iPhone.
Check your screen protector and clean your screen. Screen protectors are usually very thin these days and are designed to work well with modern smartphones.
Disconnect Lightning accessories. It's pretty uncommon these days, but we have encountered cases where connected accessories somehow get in the way of your touchscreen interactions.
How to fix an unresponsive iPhone touchscreen | Digital Trends
digitaltrends.com
Summary
On most phones, press your phone's power button for about 30 seconds, or until your phone restarts. On the screen, you might need to tap Restart .
Tip: After you restart, if your touchscreen is still completely unresponsive, learn how to reset your phone to factory settings (below)
Fix a screen that isn't working right on Android - Android Help - Google
google.com
