While indoors, navigate to and open the Camera app.
In some indoor environments, you may notice a flickering black line while recording a video with Super Steady mode or a short shutter speed in Pro video mode. This is caused by the indoor lighting and is not an indication of an issue with the phone.
Modern lighting frequently uses fluorescent or LED-based bulbs that flicker on and off very quickly. This happens so quickly that the human eye perceives it as a steady light. When a camera, such as the one on your Galaxy device, uses a shutter speed faster than this flicker, it may appear that the image is flickering or as a black bar that travels across the image.
To prevent this effect, try the following:
First, open the Power menu:
Tap Restart, tap Restart again, and then wait for your device to reboot.
Navigate to and open the device's Settings, and then swipe to and tap Software update or System updates. Next, tap Download and install, Check for system updates, or Check for software updates, depending on your carrier. If an update is available it should begin downloading automatically although you may need to tap Download now on some devices.
Try adjusting the following Display settings:
From the Device care menu, tap Storage. Then, tap your desired file category such as Images, Videos, Audio files, Documents, etc. Next, touch and hold your desired file to select it, or tap All at the top of the screen to select all of the files. Tap Delete or Delete all, and then tap Move to Trash to confirm.
To empty the Trash, tap Trash from the bottom of the Storage screen, and then tap a folder in the Trash menu. Tap the More option (the three vertical dots) icon in the top right corner, tap Empty, and then tap Delete.
From the Device care menu, tap Memory, and then tap Clean now to free up memory and stop background apps from slowing down your device.
If you would like to keep certain apps running, you can tap Excluded apps, and then tap Add (the plus sign) to select your desired apps.
Certain downloaded apps can make your phone or tablet freeze, crash, or lag. Some apps can even affect camera functionality, cause audio issues, and affect network connectivity.
Using Safe mode disables all downloaded apps and loads only the original software that came with your phone or tablet, allowing you to determine if the issue is caused by an app or with the device itself.
If the issues do not appear while in Safe mode, the problem is caused by a downloaded app, and it should be uninstalled.
First, open the Power menu:
Touch and hold Power off until the Safe mode icon is displayed. Tap Safe mode to start your device in Safe mode. If you've entered Safe mode successfully, you'll see “Safe mode” displayed at the bottom of the screen.
Use the phone or tablet normally to see if the issue has been resolved. If the phone or tablet is operating normally, a recently installed app was most likely causing the issue.
One by one, uninstall any apps you downloaded just before your phone or tablet began having the issue.
From your Home screen, swipe up to open the App drawer. Find the app you want to remove, and then touch and hold the app's icon until a popup menu appears. Tap Uninstall, and then tap OK to confirm.
After uninstalling each app, exit safe mode and check for normal operation.
After you uninstall the app that caused the issue, you can reinstall the other safe apps you just deleted.
First, open the Power menu:
Tap Power off to turn off the device. Wait until the phone or tablet completely turns off, and then press the Power button again to turn it on. Check if the issue has been resolved.
Make sure to back up your phone or tablet. All data and settings will be erased.
Write down the username and password for the account that you used to back up your data.
We recommend having your phone or tablet plugged into the wall charger during the reset process because it may take up to an hour.
If you have encrypted the SD Card inserted in to your phone or tablet, make sure to decrypt it before the reset. Navigate to Settings, search for and select SD, and then tap Decrypt SD card.
Before installing any apps, make sure that your phone or tablet is functioning normally.
If you are still encountering any issues, please visit a Samsung walk-in service center or you can schedule a repair service online.
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