Modern Xiaomi Redmi smartphones have powerful screens and excellent multimedia capabilities, but even the highest-quality display is not comparable to the diagonal of a home TV. Often there is a need to show friends a vacation video, run a movie from an online cinema or demonstrate a presentation on a large screen without the use of unnecessary wires. Fortunately, the MIUI ecosystem offers built-in tools for instant wireless image transfer.
In this article, we’ll look at all the current ways to connect, from standard system features to third-party apps that will help if standard methods don’t work. You’ll learn how to set up a wireless monitor, use the DLNA protocol, or use the built-in Google Cast. It’s important to understand that picture quality and connection stability are directly dependent on the speed of your local network.
Before you start setting up, make sure your router supports 5GHz, as high-resolution video streaming requires a wide channel. Many users mistakenly believe that it is enough to turn on Bluetooth, but only a WiFi module is used to transmit video. Let's look at the technical details and get the equipment ready for work.
Technical requirements and network preparation
A stable LAN is the foundation of a successful broadcast. 1080p or 4K video stream requires high channel bandwidth. If your router only works in the 2.4GHz band, there may be delays and image artifacts, especially when viewing dynamic scenes.
The key is to have both devices on the same subnet, which means that both Redmi and Smart TVs must be connected to the same router, and using a guest network or mobile hotspots (distributing Internet from a phone) often blocks the ability to detect devices from each other for security reasons.
- 📡 Make sure your WiFi frequency is 5GHz to minimize delays.
- 🔌 Connect the TV to the router via LAN-cable if the WiFi signal is weak.
- 📱 Check that the smartphone does not include the mode “traffic saving” for WiFi.
⚠️ Note: Some corporate networks or public WiFi in hotels may have customer isolation (AP Isolation, which physically prevents devices from seeing each other, and in such cases, you can't create a live stream.
It's also worth upgrading your router's firmware to the latest version. Manufacturers often release patches that improve the stability of IGMP and UPnP protocols, which are critical for media streaming. If you're using a complex Mesh system, try connecting both devices to the same node.
Check your Xiaomi's power saving settings. Aggressive MIUI algorithms can limit the background operation of network modules to save battery life.This can cause the connection to break at the most inopportune time of watching a movie.
Use of the built-in "Translation" function
The easiest and most native way to display an image is to use the system function Broadcast, which is based on the Miracast protocol, which allows you to completely duplicate the screen of your smartphone on your TV, which is ideal for demonstrating a photo gallery, games or application interface that does not have built-in Cast support.
You don't need to install any additional software to activate this feature. You just unlock the Redmi screen and lower the notification curtain. In the Quick Settings panel, find an icon called "Translation" or "Cast." If there's no icon, click on the edit pencil and drag it to the active area.
Path to the menu: Settings → Connection and Sharing → BroadcastOnce enabled, the phone will start searching for available devices. The TV may also need to run the Screen Share, Miracast or Translation app, depending on the model and brand of your TV.
- 🖥️ Click on the name of the TV in the list of found devices.
- 📺 Confirm the connection on the TV screen if you receive a request.
- 🔄 Image from the phone will appear on the big screen with minimal latency.
It's worth noting that when you use this method, the screen of your smartphone should stay on. The Miracast protocol broadcasts a video stream in real time, so turning off the phone's display will interrupt the connection, which distinguishes this method from streaming videos via YouTube or Netflix, where the phone acts only as a remote control.
⚠️ Attention: When broadcasting live, the battery consumption of the smartphone increases significantly. it is recommended to keep the device connected to the charger or use wireless charging while watching.
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If the broadcast works with jerks, try to reduce the resolution of the output image in the settings of the function "Translation" or turn off on the TV modes of improving the picture (Motion Flow), which add a delay.
Broadcasting via Google Home and Chromecast
Most modern TVs running on Android TV or having a built-in Chromecast module allow you to stream content directly from apps, which is a more energy-efficient way, since the phone only sends a command to launch, and the video is downloaded by the TV directly from the Internet.
The official Google Home app is best suited for managing such devices and broadcasting the entire smartphone screen. It is pre-installed on many Xiaomi Google-certified devices, but if it is not, download from the Play Market. The app automatically detects Chromecast devices on your network.
The process of screen duplication through Google Home is as follows:
- Open the Google Home app on your smartphone.
- Find your TV card in the list of devices.
- Press the button "Cast my screen".
- Confirm the action in the pop-up window.
The main advantage of this method is the ability to continue using the phone for other tasks (correspondence, calls), although the image will still be duplicated. Image quality is often higher than Miracast, thanks to the optimization of Google codecs.
☑️ Pre-launch checks
However, there are limitations: some applications that are protected by DRM (digital rights) can block screen recording or broadcasting through third-party means, displaying a black screen with sound, in such cases it is better to use the built-in Cast button inside the video player itself (YouTube, Netflix, Kinopoisk).
Third-party applications for complex cases
Staffing doesn’t always work perfectly, especially if you have a “untethered” TV (not a Smart TV or an older model) or specific network settings, and in such cases, third-party applications that use different compression and data transfer algorithms come to the rescue.
One of the most popular solutions is Web Video Caster or TV Cast, which can pull video streams from your browser and send them to your TV, supporting almost any video file format, and is especially useful if you're watching videos on sites that don't have an official "Translate" button.
| Annex | Type of transmission | Support for formats | Advertising |
|---|---|---|---|
| Web Video Caster | DLNA / Chromecast | MP4, MKV, AVI, HLS | Available (in the free version) |
| LocalCast | DLNA / AirPlay | All popular. | There is. |
| Xiaomi Mi Remote | Infrared/WiFi | Control, not video. | No. |
Another powerful tool is AirScreen (set on TV) in conjunction with the app on your phone, which allows you to turn a regular Android box into a full receiver AirPlay or Miracast with advanced buffer settings. Xiaomi also applies to the ecosystem application Mi Home, if your TV is also made by Xiaomi or Mi TV.
⚠️ Note: When installing third-party apps, carefully review the permissions you request. Some free programs may require access to contacts or a microphone, which is not relevant to the video streaming feature.
It's important to remember codecs. If your TV doesn't support a certain audio format (e.g. DTS), when you stream a file over DLNA, you can see a picture but not hear the sound. In such cases, the app on your phone must be able to recode the stream on the fly, which requires high performance of the Redmi processor.
What to do if the app doesn’t see the TV?
Addressing delays and quality issues
Even with a perfect setup, users may experience audio and image desynchronization or periodic hang-ups. This is often due to overloading the WiFi channel by neighbouring routers, especially in apartment buildings. Changing the WiFi channel to a less busy one (for example, from 1st to 11th or 36th in the 5 GHz range) can dramatically improve the situation.
If you see "squares" or blurring, try lowering the bitrate in the broadcast settings. Some applications have a "Quality" or "Resolution" option. Setting a 720p value instead of 1080p often makes the picture smoother, removing jerks, as less bandwidth is required.
- 📉 Switch router to channel with less interference.
- 📵 Turn off downloads on other devices on the network while browsing.
- 🧹 Close background apps on your smartphone that consume the network.
The problem can also be overheating of the smartphone: When the data is transmitted and the screen is active, the Xiaomi processor heats up and can reset frequencies (trottling), which leads to a drop in the performance of the WiFi module.
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The stability of the broadcast is 80% dependent on the quality of the WiFi signal and the absence of interference in the air, not only on the power of the smartphone.