Prepare Samsung DeX A great feature that provides a desktop-like experience on a larger screen on your Samsung Galaxy phone. If you use it regularly, but it suddenly stops working, you may be wondering what happened. Fortunately, you can easily get it working again by following the fixes below. Let's check out different ways to get Samsung DeX functionality back on track.
1. Restart all connected devices.
The first thing you should do if Samsung DeX is not working is to restart all connected devices, including:
- Samsung Galaxy phone
- Wi-Fi modem, if you are connecting wirelessly
- PC, if you're using DeX on a computer
- TV, if you're connecting DeX to a TV
2. Check compatibility
For DeX to work properly, you must check your hardware compatibility. Samsung DeX does not work on all Samsung phones. It is only available on the Samsung S8 series and later, excluding the Galaxy Flip series.
Additionally, you must have a Miracast-enabled TV to use DeX wirelessly. Similarly, Windows PCs with an ARM processor may not be compatible with DeX. Touchscreens and Samsung DeX for Mac are also not supported. Check List of DeX compatible devices And display it on the official Samsung website.
Tip: Check out other methods. To control your Android phone remotely from your computer.
3. Check connected devices
Hardware plays a crucial role in DeX's proper operation. You need to ensure that everything is working smoothly. For example, if you're using a DeX station, make sure your phone is positioned correctly. If necessary, remove and replace your phone.
If DeX isn't working on your TV or monitor, try connecting it to a different device. There's a chance your monitor isn't compatible with DeX.
4. Check the USB cable.
For DeX connections via cable, make sure the cable is securely connected. Remove and reconnect it. Also, try using the original cable that came with your phone and connecting it through a different port on your computer or monitor to get DeX working again.
5. Connect to the same Wi-Fi network
If you're trying to use DeX wirelessly, make sure your phone and the device you're trying to connect (TV or PC) are connected to the same Wi-Fi network.
Tip: Do you Your Wi-Fi connection is slow All over the house? These steps can help remedy the situation.
6. Switch to a different Wi-Fi band
Some displays are not compatible with the 5GHz Wi-Fi band, so it's a good idea to switch to the 2.5GHz network on both devices in the Wi-Fi settings.
7. Disable power saving mode
When using DeX mode, you must turn off power saving mode on your phone.
- Go to Settings -> Battery & device care -> Battery.
- Stop the switch next to "energy saving".
- Also try charging your phone before using DeX or keep it plugged in when connecting to DeX.
- If you are using USB hub To HDMI , make sure it's connected to a power source; otherwise, you'll only be able to mirror the display and won't have full use of DeX's capabilities.
8. Turn off VPN
DeX may not work properly if your phone or TV/PC is connected to a VPN. You should turn off your VPN and then try using DeX.
9. Change USB mode on phone
When you connect your phone to your computer using a USB cable, you'll see a USB options notification in the notification panel. Tap this notification, then try resetting the connection by switching to “Phone charging only” , then back to "File Transfer"This should fix the DeX not working issue.
10. Install, open, or restart the DeX app on your computer.
Unlike TV, where you can use DeX without installing anything, you first need to Download DeX On your Windows PC.
Next, make sure the DeX app is open on your Windows PC when you try to use it. It's possible that your computer has closed the DeX app. If you don't see the DeX app icon on your taskbar, open it.
However, if the DeX app is already running, restart the app by closing and reopening it.
Tip: Do you want to? Use Samsung DeX at a professional levelLearn how to get started.
11. Run the DeX app as administrator on your computer
If DeX still doesn't work on your PC, launch the DeX app with administrator privileges. Right-click the DeX app icon on your PC and select "Run as administrator".
12. Start DeX mode on your phone
Your Samsung phone will usually automatically switch to DeX mode when connected via a USB-C to HDMI adapter. If this doesn't happen, enable DeX as described below.
- Go to the DeX screen either from Quick Settings Or from “Settings -> Connected devices -> Samsung DeX.”
- click on the button “Start DeX”Also, enable the toggle next to “Auto start when connecting HDMI.” This will automatically start DeX mode when you connect an HDMI cable.
Tip: In previous versions of OneUI, you will need to go to “Settings -> Advanced feature -> Samsung DeX.” Enable the toggle next to "turning off".
13. Select the correct connection mode.
In OneUI 5 and later, both your PC and TV/monitor will appear in the list of available devices under the “Connect Wirelessly” section.
In previous versions of OneUI, Samsung offered two separate modes for connecting to DeX: “DeX on TV” (or monitor) and “DeX on PC.” You must select the appropriate mode when connecting to DeX.
Go to “Settings -> Advanced features -> Samsung DeX.” Click on three-dot icon at the top and select Switch to PC Or “Switch to TV or monitor” Depending on the available option.
14. Select Samsung DeX from the notification panel.
After connecting DeX, if your TV or monitor starts mirroring your phone instead of switching to DeX, tap the Samsung DeX notification in the notification panel, followed by Samsung DeX. That's it. Samsung DeX mode will immediately launch on the connected device.
Pro Tip: On some phones, you may need to find the HDMI mode settings and switch to DeX from mirroring.
15. Update USB drivers
If you're able to connect your phone to your PC wirelessly, but USB mode isn't working, you should update the USB drivers on your Windows PC. The Samsung DeX not working issue may be caused by outdated drivers.
- Connect your phone and computer via USB cable.
- Right click on start menu and select "Device Manager".
- Find any USB drivers that show an error or warning sign, then right-click on them and select "Update Driver".
Pro Tip: You can also check for driver updates through "Settings -> Windows Update" or "Advanced options" on the Windows Update screen, followed by "Optional updates -> Driver updates." Install any USB drivers that appear there.
16. Clear the cache and data of the DeX app on your phone.
As with everything, you should try the golden trick toClear cache And data of all DeX related apps on your Samsung Galaxy phone to fix DeX not working.
- Open Settings on your Samsung Galaxy phone.
- Go to "Applications".
- Type “DeX” In the search above, then select each item that appears one by one.
- Go to “storage” And press "Clear cache" , followed by a button “Clear data”. Repeat this for the other DeX-related apps you find in step 4.
- Restart your phone.
Good to know: Do you have a Samsung TV? Find out. How to pair it with Alexa.
17. Update the DeX PC app
If Samsung DeX fails to work on your computer, you should update the DeX PC app. You may be using an outdated version of the app, which may be buggy or incompatible with your phone. To update the Samsung DeX app on your Windows PC, follow these steps:
- turn on DeX app on your computer.
- Click on the icon Settings above.
- Scroll down and click the . button "to update".
18. Reinstall the DeX app on your computer.
If updating the DeX app doesn't work on your computer, you'll need to reinstall the app. Uninstall the DeX app from your computer, restart your computer, and then reinstall the app.
19. Start Samsung Services on your computer
If you're connecting DeX to your PC with a cable, make sure Samsung Mobile Connectivity Services is started. These services are usually set to start automatically, but this may have changed.
- in Windows search Yours, write Services Select the best match below.
- Scroll down and search for “Samsung Mobile Connectivity Service” Or “Samsung Mobile USB Connectivity Launcher”Right click on it and choose "Start".
- Reconnect USB cable.
- Take a look at "Startup Type" Next to the service. If it says anything other than "automatically" , right-click on the service again and go to "Properties".
- Choose "automatic" in "Startup Type"Click the button. "Application" to save the changes.
20. Adding the wireless display feature in Windows 11
If Samsung DeX isn't working on Windows 11, you may need to add Miracast (Wireless Display) feature Manually on some Windows 11 computers.
- Go to “Settings -> Apps -> Optional features.”
- Click “View features”.
- Look for Wireless displaySelect it and press the button. "the following". Follow the on-screen instructions to install it.
- After installing it, Restart your computer Then try using DeX on your PC.
21. Download Samsung DeX Patch
If your Samsung Galaxy phone was manufactured and managed by a company and DeX mode doesn't start, you'll need to download the DeX patch. But first, check if the patch is required.
- Disconnect your phone from the screen.
- Open Settings on your Samsung phone and go to About Phone -> Software Information.
- Scroll down and find Knox CustomizationIf it appears, you'll need to download the DeX patch. Open Knox website In a browser on your Samsung phone and follow the on-screen instructions to download the patch.
22. Contact your computer administrator.
Do you have a company or school-owned computer? If the answer is yes, and the above solutions don't help, you should contact your computer administrator, as some public computers have security software installed that prevents DeX from working properly.
23. Reset settings on your Samsung phone
Finally, if DeX isn't working, you should reset the settings on your Samsung phone. Doing this will restore all settings to their original values, fixing any issues you may be experiencing while using DeX. Don't worry, this won't delete any data or files from your phone.
To reset settings on your Samsung Galaxy phone, go to “Settings -> General Management -> Reset -> Reset All Settings.”
Tip: Customization is one of the strengths of Samsung Galaxy phones. We explain. How to customize your home screen according to your preferences.
Frequently Asked Questions
Q1. How do I fix DeX not working on my Mac?
answer. As mentioned earlier, Samsung DeX is no longer supported on Mac. However, if you have the older version installed and it's not working, you'll need to grant some permissions.
On your Mac, go to System Preferences -> Security & Privacy -> General tab. If you see a message saying “Downloading of system software from developer DEVGURU has been blocked.” , click on "Grace" within the section “Allow apps downloaded from.”
Also go to System Preferences -> Security & Privacy -> Privacy tab -> Accessibility. If Samsung DeX doesn't appear, tap the icon. "+" and select “Samsung DeX”.
Q2. How do I reset Samsung DeX?
answer. There is no option to reset Samsung DeX. On a PC, reinstall the app, and on a phone, Clear DeX app data.
