Modern smartphones Xiaomi, Redmi and POCO They have powerful screens, but often you need to display the image on a large panel. Built-in wireless display allows you to broadcast the contents of the screen of the smartphone on the TV, projector or computer without using the device. HDMI-This technology is based on the Miracast standard, which provides high-definition video over Wi-Fi.
Many users mistakenly believe that the broadcast requires the Internet, but this is not true. Communication is established directly between devices via Wi-Fi Direct, which means no load on the router and the ability to work even if you do not have access to the global network. Understanding the principles of this protocol will help to avoid delays and desynchronization of sound.
In this article, we will discuss in detail how to activate and configure the broadcast, what hidden settings exist in the MIUI and HyperOS shell, and also discuss typical connection problems, you will learn how to achieve minimal latency during games and how to correctly output video from multimedia applications.
The principle of operation of Miracast technology in the shell of MIUI
The wireless display feature in Xiaomi smartphones is implemented through a software add-on over the Miracast system protocol. Unlike the Chromecast, which requires the installation of the Google Home application and works through the cloud or local network of the router, the wireless display creates a direct display. P2P-The smartphone is the source of the signal (Source), and the TV is the receiver (Sink).
The data is transmitted in real time: video stream is compressed by the H.264 or H.265 codec and transmitted over the Wi-Fi channel. That is why the image quality and the presence of delays (input lag) are directly dependent on the power of the wireless module in the phone and the TV antenna. The MIUI shell hides complex technical parameters, giving the user a simple interface to find devices.
It is worth noting that when an active connection is in place, the smartphone can operate in hotspot mode or use an existing Wi-Fi connection, but the bandwidth of the channel is divided. For best image stability, it is recommended that both devices be in the 5 GHz band, as long as the router and receiver support this standard.
How to Find and Activate a Wireless Display
In current versions of HyperOS firmware and new MIUIs, developers have repositioned controls. The standard activation path is most often through the control center. You need to swipe from top to bottom (or bottom to top, depending on navigation settings) to open the notification curtain.
You should find an icon called "Translation" or "Wireless Display." If the icon is hidden in the second page of the menu, click on the edit button (usually a pencil or three dots) and drag the desired item to a prominent place. Once you click, the system will automatically search for compatible devices within range.
An alternative method of launching is hidden deep in the system settings. It is useful if the icon in the curtain is not working or missing. Go to Settings → Connection and Sharing → Broadcast. In some regions, this item may be called "Wireless Monitor".
⚠️ Note: If your TV doesn't appear on the list, make sure it includes Screen Mirroring, Miracast or Smart View. On Samsung TVs, this is often called Smart View, and on Samsung TVs, it's called Smart View. LG — Screen Share.
☑️ Checking before connection
Configuring the parameters of the image output
Once paired successfully, the smartphone begins to duplicate its screen, but standard settings may not provide perfect quality, and in the broadcast menu (if available in your version of the software), or through the engineering menu, you can change the resolution and density of the pixels.
It's important to consider the aspect ratio. If you stream from a narrow smartphone to a wide 16:9 TV, there may be black stripes on the sides. Some Xiaomi models allow you to stretch the image, but this leads to distortion of proportions. The best way to use a mode that preserves the original proportions of the source.
To reduce battery and processor load, you can reduce frame rates. By default, the system aims for 60 FPS, but 30 FPS will be enough to watch static presentations or videos. This also reduces the heating of the case during long sessions.
- 📺 Presentation Mode: Optimizes text and static images by disabling game modes.
- 🎮 Game mode: prioritizes response speed, sacrificing the maximum bitrate of the picture.
- 🎬 Mode: Focus on color reproduction and support HDR, If the TV supports this standard.
Hidden ADB commands for advanced users
Comparison of broadcast methods: Wireless display vs Chromecast
Users often confuse the built-in wireless display feature with Google Cast technology, which are fundamentally different approaches to media transfer, and understanding the difference will help you choose the right method for a particular task.
The built-in wireless display (Miracast) mirrors what is happening on the smartphone screen in real time, including notifications, calls and desktop. Google Cast (Chromecast built-in) works differently: the phone sends the TV only a link to the content, and the TV itself downloads videos from the Internet.
| Characteristics | Wireless display (Miracast) | Google Cast (Chromecast) |
|---|---|---|
| Type of transmission | Screen mirroring (streaming video) | Broadcasting a link to content |
| Dependence on the phone | High (screen should be on) | Low (you can fold the application) |
| Battery consumption | High-pitched | Minimum |
| Delay (Latency) | Aye (depending on Wi-Fi) | Not present (sync by server) |
If your goal is to show a photo album or play a mobile game, use a wireless display. To view movies from YouTube or Netflix, you should use the built-in broadcast button in the app itself, as this saves charge and provides better picture quality.
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Use Do Not Disturb before broadcasting to prevent private messages and notifications from appearing on the big TV screen during the demonstration.
Solving problems with connection delays and breaks
The most common complaint of Xiaomi owners is the desynchronization of sound and video or snatching of a picture, which is often associated with overloading of the Wi-Fi channel. If the router is operating in the 2.4 GHz band, interference from neighboring networks and household appliances can interrupt the flow of data.
Try switching your router to channels 1, 6 or 11, or more effectively, switch to 5 GHz. It’s also worth checking if your smartphone is power-saving. The system can artificially limit the Wi-Fi module’s power to save charge, which causes a drop in transmission speeds.
⚠️ Attention: When in use VPN-In the case of a wireless display, it is often impossible to broadcast over a wireless display. VPN before the session.
Another reason could be outdated software: Check for updates to the Security app and Google Play system services, and in some cases, network resets that clear cached data about previous connections help.
- 🔄 Router reboot: a banal but effective way to clear the data buffer.
- 📶 Distance from the router: paradoxically, sometimes being too close to the router causes interference.
- 🛡️ Antivirus: Third-party firewalls can block ports required for Miracast.
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The stability of the broadcast depends on the quality of the Wi-Fi signal and the absence of interference in the air, not only on the power of the smartphone.
Use of third-party broadcasting applications
Xiaomi’s regular hardware is versatile, but it doesn’t always work perfectly with specific hardware, such as Android TV Box consoles or older TVs, and third-party solutions from Google Play come to the rescue.
Web Video Caster or LocalCast allows you to stream video files stored in your phone's memory directly to your TV without having to mirror the system, which reduces the processor's load, and Steam Link can be used for gaming streams from PC to phone and on TV.
If the built-in feature doesn’t see a specific brand of Smart TV (like older Sony or Panasonic models), try installing a receiver app on your TV that emulates the standard Miracast protocol, often solving compatibility issues.
Apps that promise to “boost signal” or “speed up transfer” should not be abused; at best, they are useless, at worst, they contain ads and miners. Android system restrictions prevent third-party programs from interfering with Wi-Fi drivers.