Force Restart Your iPhone

If there is any software glitch that is causing the touch screen to malfunction, rebooting your iPhone can fix the issue.Here are the steps that you must follow to restart your iPhone:

• Press and release the Volume Up button.
• Next, immediately press and release the Volume Down button.
• Now, press and hold the Side button on the right side of the phone.

Clean Your iPhone’s Screen

Dirt and grime on your phone’s screen can also be the culprits. They can easily interfere with the normal functioning of the capacitative touch screen.Wipe your phone’s screen . You must usually use a microfiber cloth. Wipe until the screen looks almost spotless.

Update Your iPhone

Since your iPhone’s screen is not working, you cannot update your phone the usual way. The only thing you can do is to update your phone using iPhone. You will need to put your phone in Recovery Mode for this to work. Here are the steps that you must follow:

Connect Your Phone to Your Computer: Connect your iPhone to your computer. If you are using Windows or macOS Mojave 10.14 or an earlier version, launch iTunes. If you are using macOS Catalina 10.15 or higher, launch Finder.

Put Your Phone in Recovery Mode: Now quickly press and release the volume up button. Then quickly press and release the volume down button. Then press the Side button until you see the Recovery Mode screen. Select Update: On your computer, you will see a new screen popup that will have options to restore and update. Select the update option.

Now wait for the update to finish and let your phone restart.

Perform a Factory Reset of Your iPhone

Since you are working with a faulty touch screen that refuses to respond to your touches, you cannot perform a factory reset through your phone.

Factory resetting your phone through a computer will invariably wipe all data and there is no way you can recover it. You can perform a factory reset using your computer. Here are the steps that you must follow:

• Connect your iPhone to your computer and launch iTunes or Finder (read the section above).
• Put your phone in recovery mode by quickly pressing and releasing the volume up and volume down buttons one after the other. Then press the Side button. Wait for the recovery mode screen to appear.
• On your computer, click on the Restore option you see on the popup screen.
• Wait until the device is restored to its factory settings. Once that is done and all data is wiped, your phone will restart. You will be left only with system apps and default settings.
• Now check the phone’s screen.

Remove the Screen Protector

Screen protectors are often the culprit behind sluggish touch responses and unresponsive touch screens on not just iPhones, but all other smartphones.Remove the screen protector and test your screen.

Disconnect USB-C Accessories & Lightning Cable

If there are any USB-C Accessories and/or lightning cables attached to your phone, they can cause the problem if they are faulty. Remove them and use the screen. If the screen works, those accessories or cables need replacement.