[2025 Guide] DeX Screen Mirroring: What Is It & How to Use

Have you heard of DeX Screen Mirroring? This is a powerful feature from Samsung that allows users to mirror their phone screen to a bigger display, including a PC, TV, or tablet, without the need to install other third-party applications. It makes things like working on documents, watching videos, or playing games much easier and more enjoyable when viewed on a larger screen.

If you don’t know about what DeX Screen Mirroring is, how to use it, or what to do if it doesn’t work on your device, don’t worry! In this guide, we’ll show you how to use DeX screen mirroring to make the most of your phone on a bigger screen. Keep reading.

Part 1. What is Dex Screen Mirroring?

Before we get into how to use DeX Screen Mirroring, it’s important to understand what it is, what makes it unique, and how it differs from regular screen mirroring.

In essence, DeX Screen Mirroring is a feature within Samsung’s DeX platform. It allows users to mirror the screen of their Galaxy devices, such as the Galaxy S24 or Tab S9, in real time to a TV, desktop, or projector that supports Miracast or has built-in DeX wireless support. You can connect either wirelessly or with a cable.

Compared to basic mirroring options like “Smart View” or “Miracast”, DeX Screen Mirroring is part of the DeX system. That means you can use it in regular screen mirroring mode or switch to Desktop Mode, which turns your phone into a PC-like experience with multiple windows, keyboard and mouse support, and better multitasking. It's ideal for tasks like editing documents, browsing the web, or making presentations.

It works by using wireless protocols to connect your phone and display, handling how video and audio are transmitted. The result is smooth playback, low lag, and reliable screen quality.

Moreover, DeX Screen Mirroring supports automatic discovery and quick pairing. As long as your phone and display are on the same network or connected with an HDMI cable, they can find each other automatically. There’s no need to download apps or plug in extra devices.

Here are some key factors of DeX Screen Mirroring:

• Works with a wide range of Galaxy devices, including the S8 and newer, Note series, Z Fold series, and Tab S models. It also supports most Miracast displays and official DeX accessories.
• Lets you switch between standard mirroring and full desktop mode to boost productivity.
• It supports official DeX cables, HDMI adapters, USB-C hubs, and wireless casting over Wi-Fi.
• Offers smooth performance with frame sync and H.265 decoding to keep delay under 60 milliseconds.

Part 2. How to Check If Your Windows PC Supports Samsung DeX

Although many Galaxy phones and tablets come with built-in Samsung DeX, using DeX Screen Mirroring on a PC requires a few extra steps. Your computer needs to meet certain system requirements and have the DeX for PC software installed.

Samsung DeX for PC works on Windows 10 (32/64-bit) or higher. Now, you can follow the steps below to check if your device supports the Samsung DeX screen mirroring on a Windows PC.

Method 1: Check System Specifications

Step 1. Press “Win + R” on your keyboard to open the Run dialog box.

Step 2. Type “msinfo32” and click “OK”.

Step 3. In the System Information window, review the following:

• System Version: Must be Windows 10 or later
• Processor: Intel® Core™ i3 2.4GHz or higher (i5 or above recommended), or Snapdragon 8cx and above
• Installed Physical Memory (RAM): At least 4GB (8GB or more recommended)
• Available Physical Memory: At least 500MB free
• USB Port: At least one USB-C port, or USB-A with an appropriate USB-C adapter

Step 4. Make sure your display resolution is 1024×768 or higher.

Method 2: Install and Test with DeX for PC

Step 1. Go to the official Samsung website and download the latest version of Samsung DeX for PC.

Step 2. Install the software and connect your Galaxy device to the PC via USB.

Step 3. If your computer meets the hardware and system requirements, DeX mode will launch automatically in a window.

Note: Your phone or tablet must support DeX. This includes the Galaxy S8 and newer models, as well as the Galaxy Tab S series. Only devices with One UI and built-in DeX can use DeX Screen Mirroring.

Part 3. How to Set Up and Use DeX Screen Mirroring (TV/PC/Tablet)

You will have to open the DeX settings if they are supported on your device, and then click the “Start” button. DeX will search for available devices and show you the options for connecting with the device.

Next is a brief guide for using DeX screen mirroring, including TV, PC, and tablet.

How to Use Samsung DeX on a TV or Monitor?

Step 1. Connect your phone to the display using a DeX Station, DeX Pad, or HDMI adapter.

Step 2. Ensure the TV or monitor supports DeX and is ready to accept the connection.

Step 3. Once connected, the DeX interface will appear on the external display.

How to Use Samsung DeX on PC?

Step 1. Use a USB Type-C cable to connect your phone to the computer.

Step 2. The system will automatically switch to DeX mode, and your phone's screen will be mirrored to the PC.

How to Use Samsung DeX on a Tablet?

Simply connect your tablet to a monitor or TV using a compatible cable. Once connected, the DeX interface will automatically appear on the external display, giving you a larger screen experience.

Part 4. Bonus Tip: What Can I Do If Dex Screen Mirroring Is Not Working

“My device doesn't support Samsung DeX Screen Mirroring, but I still want to cast my Samsung phone to PC. What can I do?” As an alternative, Kingshiper Screen Mirroring is the best solution, which can work well on almost all Android and Windows systems. Besides that, you can live stream to platforms like YouTube, Twitch, and Zoom, sharing the action with friends and family using this tool.

Here’s a breakdown of some of Kingshiper Screen Mirroring’s key features to get you better acquainted:

Summary

In conclusion, DeX Screen Mirroring is a useful feature for Samsung users who want to mirror their phone to a larger display like a computer, TV, or tablet, either with a USB cable or wirelessly.

With DeX Screen Mirroring, you can easily multitask in separate windows and make full use of your phone’s power, creating a desktop-like experience. The setup is quick and simple, as long as your devices are compatible.

If you run into compatibility issues with DeX Screen Mirroring, you can try Kingshiper Screen Mirroring. It’s a stable, powerful alternative to DeX.