Modern multimedia systems can turn any smartphone into a powerful control center for the home theater. Owners of the Xiaomi ecosystem often face the need to bring content from a small display to a large panel for comfortable viewing, whether it is a family movie, a presentation or a mobile game that requires maximum immersion.
Mi TV Cast technology and standard Android protocols make this process as simple as possible and accessible even to inexperienced users. However, despite the apparent simplicity, there are configuration nuances that depend on the version of the operating system and device model, and understanding these details will help to avoid delays and dissynchronization of sound.
In this guide, we will discuss all the current broadcast methods built into the MIUI and HyperOS shell. You will learn how to configure a connection without third-party software, what network parameters are critical and how to improve the quality of the transmitted signal.
Basic requirements and equipment preparation
Before setting up, make sure that both devices are in the same network conditions. The Wi-Fi router must support 802.11ac or later to provide high bandwidth.If the devices are connected to different frequency bands (2.4 GHz and 5 GHz) without roaming support, detection can be difficult.
Be sure to check the software’s relevance. Xiaomi Mi TV or Redmi TVs often require an update to the built-in Mi Cast module. On your smartphone, it’s also worth checking for system updates in the Settings → About Phone → MIUI version.
⚠️ Attention: Use of mobile internet (4G/5G) Instead of Wi-Fi for high-resolution video transmission, it will lead to rapid depletion of traffic and possible image delays.
For stable operation, it is recommended to disable power saving functions on the phone, which may limit the background activity of network modules, this is especially true for models with non-autonomous battery optimization.
☑️ Checking before connection
Use of the built-in Mi Cast function
The fastest way to stream an image is to use the native Mi Cast feature built into the MIUI shell, which is based on the Miracast protocol and does not require additional applications to be installed. To start, lower the notification curtain and find the "Translation" or "Mi Cast" icon.
If the curtain doesn’t have the right widget, go to Settings → Connection and Sharing → Broadcast. The system will automatically start searching for available devices on the local network. Your Xiaomi TV or Mi Box should appear on the list.
Once you select the device, you'll see a request for confirmation of connection on your TV screen. Use the remote for consent. From now on, the smartphone screen will be fully mirrored on the large display. The resolution of the broadcast image will automatically adapt to the TV's capabilities, but may be limited by DRM protection on some video services.
- 📺 Open the notification curtain on Xiaomi smartphone.
- 📡 Click on the “Translation” or “Projection” button».
- 🔍 Wait for the name of your TV to appear on the list.
- ✅ Confirm the connection on the TV screen.
The feature allows you to work in extended screen or full duplication. In some versions of the firmware, you can control the mouse cursor from the smartphone screen, which is convenient for presentations.
Broadcasting via Google Chromecast
Most modern Xiaomi TVs run on Android TV and have built-in support for Google Cast technology, which differs from Miracast in that the phone acts only as a remote control, and the content is downloaded by the TV directly from the Internet.
To use this method, make sure that your smartphone has a Google Home app installed. Open it and find your device in the list of available equipment. Click on the Translate screen button to start mirroring.
The advantage of Chromecast is that it uses less power on your smartphone, since the video stream is not encoded or transmitted through the air from your phone, and it also provides better stability when watching videos from YouTube or Netflix.
Why black screen when you start a video?
If image quality is falling, try to bring your smartphone closer to the router.Cast protocol is sensitive to interference in the 2.4 GHz range, so using a 5 GHz network is preferable.
Third-party annexes for duplication
In situations where standard methods don't work or advanced features are required, you can use third-party software, and applications like AirScreen or ApowerMirror can overcome compatibility limitations between different ecosystems.
To install such programs on the TV Xiaomi may need to download APK-file via built-in browser or file manager. The smartphone also installs the client part of the application. Once launched, both devices must be logged in to the same account or be on the same subnet.
| Annex | Type of connection | Delay (MS) | Sound support |
|---|---|---|---|
| Mi Cast (Native) | Miracast | 50-100 | Yes. |
| Google Home | Chromecast | 30-60 | Yes. |
| AirScreen | AirPlay/DLNA | 100-200 | Partially. |
| TeamViewer Host | Proprietary | 200+ | Yes. |
Some apps allow you to stream not only the image, but also the sound from the microphone, which is useful for karaoke or remote lectures, but it is worth remembering that third-party software may contain advertising or require a subscription to unlock Full HD quality.
Connecting through an adapter
For gamers or professionals who are critical to minimal latency, wireless methods may not be suitable, in which case the only right solution is wired connection. Modern Xiaomi smartphones with a USB Type-C port often support video output via an alternative DisplayPort mode.
You'll need a special USB-C to HDMI adapter, one end connects to your smartphone, the other to the free HDMI port on your TV, and after switching the signal source to your TV (Input button on the remote), the image should appear automatically.
⚠️ Note: Not all Xiaomi smartphones support video output via USB-C. The feature is available primarily in the flagship Mi and Xiaomi Number Series.Redmi budget models may not transmit images over cable.
The advantage of cable is that there is no image compression and zero input delay, which is ideal for cloud gaming or displaying dynamic content, and the smartphone can charge if the adapter has an additional power port.
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Use HDMI 2.0 or higher cables to support 4K and HDR resolution. Cheap cables can limit frame rates to 30 FPS.
Solution and optimization
A common problem is to de-synchronize audio and video streams. If the sound is behind the picture, try changing the TV settings to Standard or disabling the post-processing of the sound, and rebooting the router also helps.
If the TV can't see the phone, check the firewall settings on the router. Sometimes AP Isolation client isolation features prevent devices from seeing each other on the LAN, and disabling this feature will solve the detection problem.
To improve performance, close the background apps on your smartphone. Heavy tasks can load the processor, causing frames to drop when encoding the video stream for transmission. Regular cleaning of the cache also has a beneficial effect on the speed of network modules.
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Connection stability is directly dependent on the quality of the Wi-Fi signal and the absence of interference in the air. If there are constant interruptions, consider using a wired LAN connection for your TV.
In some cases, resetting network settings on a smartphone helps. Go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. This will remove saved passwords and return network modules to factory settings.