Modern Xiaomi smartphones have powerful displays and high-performance processors, but sometimes the contents of the screen want to display on a large TV. Miracast technology allows you to do this wirelessly, using only a local Wi-Fi network. Owners of Xiaomi devices often face the nuances of settings, since the shell MIUI or HyperOS has its own naming features wireless image transfer.
Unlike proprietary solutions, Miracast is an open standard that ensures interoperability between devices from different manufacturers. Xiaomi is actively implementing support for this protocol in its TVs and smartphones, calling the feature “Wireless Monitor” or “Translation”. Understanding the principles of this technology will help you avoid delays and desynchronization of sound.
In this article, we will take a closer look at the connection process, look at the engineer’s hidden settings, and answer frequent questions, learn how to maximize connection stability and what alternatives exist if the standard method does not work.
What is Miracast and how does it work on Xiaomi devices
Miracast is a wireless media technology developed by the Wi-Fi Alliance that allows video to be streamed in resolutions up to 1080p or 4K and surround sound directly from a smartphone screen to a TV. Unlike Chromecast, which requires a source app, Miracast broadcasts exactly what is happening on the device's screen in real time.
On Xiaomi smartphones, this feature is often hidden in the Wireless Monitor menu. Technically, the process works via Wi-Fi Direct protocol, which means creating a direct link between the phone and the TV without having to have a router, although the router is often used as a coordination point. This provides low latency, which is critical for games or presentations.
It's important to understand the difference between DLNA and Miracast. If DLNA only transfers files (photos, gallery videos), Miracast duplicates the entire interface of the Android operating system. This allows you to show a browser, settings menu or game running on the phone. However, this load requires a good signal and a powerful processor to encode the video stream on the fly.
Technical details of codecs
Preparation of equipment and compatibility check
Before you start setting up, make sure your hardware supports the required standards. Most modern Xiaomi TVs (Mi TV, Redmi TV) have a built-in Miracast receiver. For third-party TVs (Samsung, LG, Sony), having support is often referred to as Screen Share, Smart View or Wireless Display.
Xiaomi smartphones, starting with mid-range and flagship models, feature 5GHz Wi-Fi modules, which greatly improves transmission quality. Older models with 2.4GHz Wi-Fi may have difficulty transmitting high-resolution video, which will lead to image jerks. Check the specifications of your router - preferably using a dual-band router.
It’s also worth updating the software. On Xiaomi TVs, this is done via the Settings menu → About TV → System Update. On smartphones, the path usually looks like Settings → About Phone → MIUI version. Outdated Wi-Fi module drivers can cause connection instability.
- 📱 Xiaomi smartphone with Android 5.0 and higher (support is available in almost all models).
- 📺 TV with Miracast or Wi-Fi Direct (built-in or via the console).
- 📡 Stable Wi-Fi network (preferably 5 GHz to reduce interference).
- 🔋 Battery charge of both devices is at least 30% (broadcasting consumes energy quickly).
Step-by-step: connecting the smartphone to the Xiaomi TV
Connection on devices in the same ecosystem is as simple as possible. First turn on the TV and make sure it is connected to the same Wi-Fi network as the smartphone. On the remote of the Xiaomi TV, click the button with the image of the smartphone or select the source of the Wireless Display signal from the application menu (the name may vary depending on the version of the global firmware).
On a Xiaomi smartphone, lower the notification curtain down and find the Translation icon (or “Cast”). If there is no icon, go to Settings → Connection & Sharing → Broadcast. In some versions of MIUI, this feature is in the Tools folder on your desktop called Wireless Monitor.
Once you activate the search, the phone will start scanning the available devices. When your TV (e.g. MI TV-4A) appears on the list, click on it. A request for permission to connect may appear on the TV screen — confirm it with the remote control. The image from the phone should be duplicated on the large screen.
☑️ Checklist of successful connection
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If the TV is not on, try temporarily disabling the router’s AP Isolation feature, which prevents devices on the same network from seeing each other.
Customization of third-party TVs (Samsung, LG, Sony)
Connecting to other brands requires activating the TV-side reception function. On Samsung, this feature is called Screen Mirroring or is in the signal source menu. On LG, you need to run the Screen Share app from the Smart TV app list. Sony uses Screen Mirroring technology in network settings.
Once the standby mode on the TV is turned on, the algorithm of actions on the Xiaomi smartphone remains the same. However, due to differences in the implementation of the protocol stack, sometimes it takes longer to establish a handshake. PIN-code that will appear on the TV screen, in the field on the smartphone.
It’s worth noting that some older TV models may not support the audio codecs Xiaomi uses by default, in which case the video will go and there will be no sound, and the solution could be to upgrade the TV’s firmware or use external speakers connected to the smartphone via Bluetooth while the video is streaming.
⚠️ Note: When connected to Samsung TVs, there may be a black bezel around the image, due to different aspect ratios, and you can zoom in on the settings of the TV itself (Original modes, Screen size modes»).
Use of Windows 10/11 Wireless Monitor
It is often necessary to broadcast Xiaomi screen to a computer or laptop with Windows. Windows 10 and 11 operating systems have built-in "Project on this PC" function, which implements the Miracast receiver, which is convenient for presentations or demonstration of the mobile interface without installing third-party software.
To activate on your computer, go to Settings → System → Project on that PC. If the function is not installed, click on “Additional Components” and add “Wireless Display.” After installation, select “Available everywhere on secure networks” and remember the computer name.
On a Xiaomi smartphone, your computer's name should appear in the Wireless Monitor menu. Once connected, you'll see the phone screen in the Windows window, and the delay depends on the Wi-Fi power of the adapter in the laptop and the CPU load.
| Parameter | TV (Smart TV) | Windows PC | Chromecast (Android TV) |
|---|---|---|---|
| Protocol | Miracast / Wi-Fi Direct | Miracast | Google Cast |
| Delay. | Low. | Medium | High (depending on the network) |
| Sound. | It's on TV. | Transmitted to PC | It's on TV. |
| Screen locking | Screen's on. | Screen's on. | It might go out. |
Problem Solving: Lags, No Sound and Breaks
The most common problem is desynchronizing audio and video or “suspending” images. This almost always indicates a channel bandwidth problem. If you use the 2.4 GHz band, try switching to 5 GHz. Also make sure that the smartphone is not too far from the router or TV.
Another reason for the lags may be energy saving. Xiaomi system aggressively restricts background processes. Go to Settings → Battery and Performance and select Performance mode during broadcast. Also, you should prevent the system from falling asleep for the Wireless Monitor application in the application settings.
If there's no sound, check your Bluetooth settings. Sometimes the phone tries to bring the sound to the connected headphones instead of the TV. Turn off Bluetooth on the smartphone forcefully and check if the sound came from the TV speakers. In some cases, changing the screen resolution in the engineering menu helps.
- 📶 Reboot your router and both devices (smartphone and TV) – this solves 80% of problems with your phone. DHCP.
- 🔌 Turn it off. VPN If you are using a smartphone, it changes the traffic route.
- 📉 Reduce the quality of graphics in games when broadcasting to reduce the load on the encoder.
- 🔄 Update the “Mi Remote” app or Google Play system services.
⚠️ Attention: Use of cheap USB Wi-Fi adapters to turn old TV into a Miracast receiver often lead to unstable operation. TV work more steadily.
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Miracast’s stability is 90% dependent on the quality of the Wi-Fi signal and the absence of interference in the air, not the power of the smartphone’s processor.
Alternative methods of broadcasting and applications
If the standard Miracast doesn’t work well, consider alternatives. For Android TVs (including the new Xiaomi), the built-in Chromecast is ideal. In this case, you don’t duplicate the screen, but send a link to the content, and the TV uploads the video itself, unloading the smartphone.
There are third-party applications like Web Video Caster or LocalCast. They allow you to stream video files from your phone's memory or stream video from your browser directly to your TV, bypassing the system limitations of MIUI. This often gives you better picture and support for subtitles.
For gamers who are important to the minimum delay, there are hardware solutions - game capchers with a high-quality game. HDMI Input connected to the PC and program broadcast through USB-cable (Scrcpy), although this already requires a computer and is not a wireless method in its pure form.