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Apple iPhone 6s Screen Flickering, Grey Lines, White Squares, Other Display Issues [Troubleshooting Guide]

The #Apple iPhone 6s (#iPhone6S) comes with a number of notable display features and specifications including Multi-Touch display system and a bold new 3D Touch pressure-sensitive display that allows you to press on the iPhone 6s screen and then new fascinating things happen.

This iPhone is also equipped with a screen feature that allows you to push in on the display to carry out small tasks such as popping out windows, showing little menus or any other pertinent actions. All these along with many other interesting features made the iPhone 6s one of the best smartphones Apple has ever released. But then again, not all of those who own it have the same promising screen experience.

In fact, several issues on the iPhone 6s display including screen flickering, grey lines, white squares, and other screen problems have been reported. And responding to one of our readers who have relayed to us a similar concern on the same device, we’ve come up with this post, which explicates possible causes along with a rundown of troubleshooting methods and suggested workarounds that can be used a potential solutions.

Should you bumped into this page while searching for some help in dealing with screen flickering problem on the iPhone 6s, or any of the relevant screen symptoms, read further to find out what could have possibly caused this screen problem to transpire on your device and along with some potential solutions you can try on.

But before we jump right into our troubleshooting, if you have other issues with your iPhone, make sure you drop by our troubleshooting page because we’ve already addressed a lot of issues reported by our readers. Find issues that are similar with yours and use the solutions we suggested. If they don’t work for you or if you need more help, fill up our iPhone problems questionnaire and give us more accurate information about your problem so we can give you the best solution.

Possible reasons of screen flickering and other display issues on an iPhone

Display issues can be a vivid symptom of a damaged screen component on the phone. However, there are also several instances where a device can experience similar symptom due to random software malfunctions. Other factors that can trigger the screen issues to manifest on your iPhone 6s would include but not limited to some corrupted programs or bad apps, software update bugs, and memory problems. Keep reading to learn how each of these factors can instigate screen problems to occur on your iPhone 6s.

Bad apps or corrupted files. Aside from stock apps, your iPhone 6s also contains third-party apps and programs, which you have downloaded and installed for use. There are times that any of these apps can experience random crashes or any other types of system malfunctions which somehow affects the iPhone’s display functions and that is when display issues can arise. In this case, the problem is specific to an application. It can happen after making some changes to certain option settings which for some reasons do not concur with the program structure of the app. The same problem can arise when some corrupted contents are downloaded or installed to your iPhone. Others have encountered the same issue on their iPhone display while using certain apps including the camera and some gaming apps. Some users have noticed that there iPhone screen starts to flicker or show visible grey lines on the upper portion of the Camera app viewfinder screen. Random cases of screen flickering occurs on the iPhone 6s when exposing it to artificial light while making video calls through FaceTime while others have encountered the same problem while video recording. To fix app-specific issues on your device, you would need to determine which of these apps is actually triggering your iPhone to show such display symptom.

Software updates bugs. Generally, software updates are intended to offer enhancements to some device features as well as bug fixes. But what happens during the actual implementation of the update is actually the opposite. For some reasons, a lot of iPhone owners were complaining about various issues that occur after installing software update including the most recent iOS 10. Some factors might have triggered the iPhone to develop post-update screen issues including conflicting settings configuration on certain display options or simply caused by some iOS bugs.

Memory glitches or insufficient storage. Display issues like screen flickering or unresponsive touchscreen can also denote a problem on the iPhone’s memory. Several cases of random screen problems have been reported by iPhone 6s owners, which were then found to be tied to memory issues including insufficient storage. If any of these symptoms is accompanied by performance issues like slow or sluggish responses, apps crashes, freezes, random reboots as well as red and blue screen of death (BSOD), then most likely the flickering display is just another symptom of a memory problem transpiring on the iPhone.

Faulty hardware or physical/liquid damage. In worst case scenarios, screen flickering on the iPhone 6s can be an indication of hardware damage, liquid or physical. The chances of blaming such symptoms on a faulty hardware is higher especially when your iPhone has had experienced hard drops or liquid exposure. Symptoms of physical or liquid damage can appear sooner or later after the instances of hard drop or liquid exposure on an iPhone.

How to fix iPhone 6s screen flickering or other display problems caused by the software?

Fortunately, there are a lot of workarounds you can try on to fix software-related screen issues on your iPhone 6s including the ones manifested by a flickering display. What we have listed subsequently in this content are some widely-known and efficient solutions used by those who have dealt with relevant symptoms on the same device. But then again, these methods would only work if the problem is triggered by the software and that there are no damages to any of the iPhone’s screen components.

If you’re certain that the problem is not triggered by a faulty hardware on your iPhone, then you may proceed and give any of the following workarounds a try. Otherwise, consider taking your iPhone to an authorized service center to for hardware check-up and repair, to save time and effort from doing all the troubleshooting.

Step 1. Restart/Force Restart

Several instances of flickering displays were linked to a faulty application or random program malfunctions. If this is the first time that your iPhone shows the symptom, then it’s more likely just a random app problem which can be rectified by a simple restart. You can restart your iPhone if the screen flickers or becomes unresponsive to touches while using certain apps.

  • To do so, press and hold the Sleep/Wake button until the red slider shows. Drag the slider to power off your iPhone completely and then after 30 seconds, turn it back on by pressing the Sleep/Wake button until the Apple logo appears. Your iPhone should then reboot.

Alternatively, you can perform a force restart if your iPhone screen is frozen or not responding to touches while using certain app.

  • To force restart your iPhone 6s, press and hold the Sleep/Wake and Home buttons for at least 10 seconds until the Apple logo appears. The iPhone should then reboot.

Both of these methods are considered efficient and safe solutions for any software-related issues, as they won’t erase your iPhone contents.

Step 2. Manage your iPhone settings

If the onset of screen flickering or other screen problems occurs after making changes to your iPhone settings, then there is a higher chance that the problem is caused by an incorrect configuration or perhaps, using of incorrect display options on the iPhone. Some users were able to fix it by enabling Reduce Transparency option under the Accessibility menu. It wouldn’t hurt if you give it a try on your end this time and see what happens.

  • To configure this option, head over to your iPhone Settings-> General-> Accessibility-> and then toggle the switch next to Reduce Transparency to turn the feature on.

When enabled, the Reduce Transparency option lightens the graphical workload that your iPhone has to deal with by eliminating some of the transparent aesthetic iOS features.

Step 3. Manage internal storage of your iPhone

Insufficient memory can also lead to similar issues especially when trying to install new apps to your iPhone. In this case, check your iPhone’s current memory status and free up some space, if necessary to allocate more apps and processes without any problem. You can remove non-essential apps and contents from your device including old messages, photos and videos. Alternatively, you can move some important files from your iPhone 6s to a computer or any other available storage media for backing up purposes.

  • To check your iPhone storage, go to Settings-> General-> Storage & iCloud Usage-> Manage Storage. On the following screen, you should see a list of your apps and how much storage each one of them uses. You can tap an app from the list to view more information about its usage. If you find something unusual about an app, then you should do something about it to ensure it’s not causing any problem to your iPhone’s overall function.

Typically, your device will prompt you a Storage Almost Full alert when your device is almost full and that iOS cannot free up space. If you see this alert, then you will need to remove unwanted contents yourself. Depending on the app, you might be able to delete some of its content, otherwise, delete the app and all of its content if necessary.

You can also use iTunes to check and manage your iPhone storage. If you prefer this method, then you should secure a computer with an update OS and latest version of iTunes installed. Once you’re all set, proceed with these steps:

  • Open iTunes on the computer.
  • Connect your iPhone to the computer.
  • In iTunes, select your iPhone 6s from the list of available devices. You should then see a bar showing how much storage your iPhone content uses divided by the content type.

To view more information, move your mouse over a content type like Other or Apps.

Step 4. Restore your iPhone

Performing a system restore might be the thing you need especially if the screen problem is triggered by a more serious issue on the software and could not be resolved by any other applicable methods. But before you do so be sure to back up your iPhone contents as they will be erased in the process. After your iPhone system is restored, you can set up your device as new. The standard procedure is done through iTunes. So once again, you will need to secure a computer with the latest version of iTunes installed. Also make sure that the computer is running the latest operating system to avoid any issues on software incompatibility. Proceed with these steps when you’re ready:

  • Connect your iPhone to the computer using the supplied USB cable.
  • Open iTunes on the computer.
  • In iTunes, go to the Summary panel and then select the option to Restore.

Wait until the restore process is finished and by then you may continue to bring data back to your iPhone manually through iCloud or iTunes. As much as possible, do not restore from a previous backup as there is a higher possibility that the issue can re-occur especially if it was caused by some corrupt files or buggy contents from the previous iOS.

Alternatively, you can use other tools to restore your iPhone instead of iTunes. You may take advantage of any of the most credible freeware like Reiboot, which is used to fix system issues on an iOS device including those that are manifested by screen flickering or other display problems like unresponsive touchscreens. These freeware tools are usually designed with options for you to manually hard reset or restore your iPhone to fix a certain issue with just a single click. If you want to give this a try on your end, be sure to pick the freeware that is highly compatible with your iOS device so as to increase your chances of success in the end.

Fixing screen flickering problem that is specific to the camera app

If your iPhone screen flickers only when using the camera app, it’s a clear indication that something is wrong with the app. In this case, you may try any of the following workarounds:

Disable Portrait Mode

  • To do so, navigate to Settings-> Photos & Camera, locate the Portrait Mode switch and then toggle to turn it off. Disabling this camera app option will reduce the flicker sensor factor while focusing on the subject’s face and object boarders in video calls.

Disable 60fps video recording option

  • Sometimes, your iPhone may not be able to render the specified video recording option due to certain factors, and thereby results to a screen issue including flickers and grey lines while using the camera app for video recording or capturing images. In this regard, you may attempt to switch it back to its default 30 FPS (frames per second) and see the result.

Update iOS

  • The latest iOS version integrates several enhancements including updates to the iPhone’s camera app features and functions. This is why it is highly recommended to keep your iPhone iOS updated, so as to optimize your iPhone’s camera app and its overall function.

Contact Apple Support for further assistance

If you’ve done all possible solutions including the ones recommended in this post but the problem persists or your iPhone 6s screen still flickers, then I suggest contact Apple Support to escalate your concern and request for further assistance and other options. You should also consider the possibility of a hardware problem this time. Alternatively, you can just head over to the nearest iPhone service center in your place and have your iPhone hardware checked for any possible damage.

Engage with Us

We are here to help! Should you need further assistance in dealing with other issues on your iPhone or other iDevices, you can reach us through this form available in our Troubleshooting Page. Simply fill up the form with all the required information and then submit it to us. We would appreciate if you could provide us with all significant details including error codes, warning messages, or any other prompts you may get, as they will help us determine what has possibly gone wrong with your device and what needs to be done in order to fix it. The more information we have the easier for us to come up with a more precise and efficient solution and recommendation for you to try on. You may also browse for more solutions to other iDevice issues we’ve previously addressed through dedicated contents posted in our troubleshooting pages.

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