Screen flashes green on Galaxy A57 5G
If your Galaxy A57 5G screen briefly flashes green when you turn it on, updating your device to the latest software version can quickly resolve the issue.
Galaxy phone or tablet won't install apps from unknown sources
By default, your Galaxy phone or tablet is set to prohibit apps from being installed from sources other than the Play Store and Galaxy Store. However, you can change this setting if desired. Please be aware that this can increase security risks.
Galaxy phone or tablet won't install apps from unknown sources
Warning
Your phone and personal data are more vulnerable to attacks from unknown apps. By installing apps from other sources, you agree that you're responsible for any damage to your device or loss of data that may result from their use.
2
Allow permission.
Tap the switch next to the source that you want to allow app installations from, such as Chrome.
Note
You can tap Deny all if desired.
3
Try to install the app.
Your phone or tablet may prompt you with an option to allow Google to inspect installed apps for security. If enabled, this option may still prevent apps from installing.
If this occurs, you can try going back to the app or file you'd like to install, and then try installing it again.
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Dark or colored spots in photos on Samsung phone or tablet
If the photos you took on your Galaxy phone are marred by random dark, black, pink, or other colored spots, there may be a problem with the Camera app. This is most often caused by a software issue rather than a fault with the actual screen or camera.
Galaxy phone or tablet Smart View or Screen Mirror issues
Smart View can be used with Galaxy phones and tablets running Android 4.3 or above and with devices that support Miracast wireless display technology. This technology is built into most newer Samsung smart TVs. However, your phone or tablet must be connected to the same network as your TV in order to use this function. If Smart View is not working,
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