Modern smartphones like the Xiaomi Redmi 9 have powerful multimedia capabilities, but the device’s screen is still inferior in size and color quality to LG’s modern OLED and LED panels. Users often face the desire to stream video, photos or even gameplay to the big screen to get the most out of the content. Fortunately, the Android ecosystem and the webOS operating system on LG TVs offer many ways to do this.
There are several synchronization methods available, from fully wireless protocols to wired solutions that require additional accessories, depending on your goals, hardware availability and picture quality requirements. In this article, we will discuss each option in detail, paying attention to the nuances of setting up Wi-Fi Direct, Miracast and the Internet. HDMI-Understanding these processes will allow you to avoid the typical errors in pairing devices.
Some methods require a stable Internet connection, while others work locally, creating direct communication between gadgets. It is important to consider that Redmi 9 is equipped with a Wi-Fi module standard 802.11ac, which provides sufficient bandwidth for high-resolution video transmission. We will also discuss how to minimize signal latency when playing mobile games on a large screen.
Wireless broadcasting through the built-in broadcast function
The easiest and most affordable way to display a Xiaomi Redmi 9 image on an LG TV is to use the built-in “Translation” (Cast) feature, which is based on the Miracast protocol, which is supported by most modern Smart TVs. To start, you do not need to install third-party applications, it is enough that both devices are on the same local network.
The first step is to activate the reception mode on the TV. In the LG menu, this is often done automatically when you request a connection, but in some models you need to start the Screen Share application or select the source of the Screen Share signal from the login list, and then the TV will go into the waiting mode of the connection, displaying the device name on the screen.
Next, we pick up the Redmi 9 and drop the notification curtain. Among the quick access icons, find the Translation item (can be called Translate, Cast, or Wireless display). If the icon is not there, click on a pencil or three dots in the corner of the curtain to add it to the panel. Once turned on, the function will start searching for available devices within the range of the Wi-Fi signal.
When your LG TV appears on the list, tap its name. You may have a request for permission to connect on your TV screen — it needs to be confirmed by the remote control. From now on, the smartphone screen will be duplicated on a large panel. Note that the quality of the picture depends on the signal strength and network load.
- 📡 Make sure both devices are connected to the same Wi-Fi network (2.4 GHz or 5 GHz).
- 🔄 Restart your router if the list of available devices is empty or the search takes too long.
- 📱 Close background apps on Redmi 9 to improve broadcast performance.
⚠️ Warning: Miracast wirelessly can cause a slight delay (input lag) between the action on the smartphone and the display on the screen. This is normal for this technology, but can interfere with dynamic games.
Using Google Chromecast technology
Many modern LG webOS TVs have built-in support for Google Chromecast built-in, which allows you to stream content from apps directly without duplicating the entire screen of your smartphone, which is more energy efficient for the Xiaomi Redmi 9 and provides better video quality, since the TV itself downloads content from the Internet on command of the phone.
To take advantage of this method, make sure that the Chromecast feature is enabled on the TV. It is usually active by default, but you can check this in the settings of the network or LG applications. On the Redmi 9 smartphone, open the application from which you want to stream the video, for example, YouTube, Netflix or VK Video.
In the app interface, find a broadcast icon — it looks like a rectangle with Wi-Fi waves in the corner. Click on it and select your LG TV from the list. The video will play on the big screen, and the smartphone can be used as a remote control: pause, change volume or switch tracks.
The advantage of this method is that you can turn off the app or even turn off the phone screen, and the playback will not be interrupted, which is especially convenient when watching long movies or TV shows, but it requires a stable Internet connection with high download speeds.
💡
If the Chromecast icon doesn’t appear in the app, make sure the Google Home app is installed and updated on your Redmi 9.
Importantly, not all apps support native broadcasting, and in such cases, you can use Screen Translation within the Google Home app itself. Open the app, select your TV, and click Translate screen, which will create a software bridge similar to Miracast, but through Google's infrastructure.
Connection via HDMI cable and USB-C adapter
For users who are critical to image quality and lack of delay, wired connectivity is the best solution. USB Type-C on Xiaomi Redmi 9 supports standard USB 2.0 and does not support technology MHL Or DisplayPort Alt Mode. That means that a conventional cable is a transponder. USB-C on HDMI no-one will work.
To implement a wired connection, you need a special adapter that works through the DisplayLink protocol. These adapters contain a mini computer inside that compresses the video signal and transmits it through the DisplayLink protocol. USB-It's a universal solution, but it requires the installation of additional software.
The connection process is as follows:
- Buy a USB-C to HDMI adapter with DisplayLink support.
- Connect the adapter to the Redmi 9 charging port.
- Insert the HDMI cable at one end into the adapter and the other into the HDMI IN port on the LG TV.
- Download and install the DisplayLink Presenter app from Google Play Market.
- Launch the application and give the necessary permissions to record the screen.
Once you do this, the smartphone image will appear on the TV, and the quality will depend on the power of the adapter processor and the speed of the application, and it should be noted that this method consumes a significant amount of power, so the adapter must have additional power via USB.
| Parameter | Wireless (Miracast) | Chromecast | Wire (DisplayLink) |
|---|---|---|---|
| Delay (Latency) | Medium (100-300 ms) | Low (network dependent) | Minimum |
| Image quality | Good (compression) | Excellent (up to 4K) | Depends on the adapter. |
| Battery consumption | High-pitched | Low. | Very tall. |
| Need for PO | No. | In annexes | Driver required |
LG TV Plus app for management and media
LG has developed the official LG TV Plus app, which turns the smartphone into an advanced remote control and media center. Although it is not designed for full real-time mirroring, it is ideal for viewing photos and videos stored in the memory of the Xiaomi Redmi 9.
To get started, download the app from Google Play and run it. It will automatically scan the network and find a compatible LG TV. The first time you connect to the TV screen, you'll see a confirmation code that you need to enter on your smartphone, which provides security and protects against unauthorized access.
After pairing, go to Media or Gallery. Select the photo or video you want to show. From the play menu, select Translate to TV or the TV icon. The file will be sent to the TV and played by the built-in webOS media player.
☑️ Checking before connection
The main advantage of this method is that you can control playback from your phone anywhere in the room, you can create playlists, you can control playlists, you can even use your phone as a touchpad to navigate the Smart TV menu, which makes viewing family archives on the big screen as comfortable as possible.
Broadcasting through DLNA-server
Another professional way to transfer media is using the DLNA protocol, which allows you to stream content from Redmi 9 to LG TV without being tied to specific branded applications, and to do this, you need to install a server application on your smartphone, such as BubbleUPnP, VLC for Android or AllConnect.
The principle is that the phone becomes a media server, and the TV becomes a renderer, and you open the app on your smartphone, select the file, and specify the target device (your LG TV), and the TV receives the data stream and decodes it on its own.
This method is especially useful if standard methods do not work or if the video file format is not supported by the phone's native player, but is supported by a TV. VLC player, for example, is able to broadcast almost any video and audio formats available in the device's memory.
⚠️ Note: When using third-party DLNA-Make sure that local networking is allowed in the Android firewall settings, otherwise the TV won’t see the server.
Setting up DLNA may seem more complicated than a simple Cast, but it gives you more control over the quality of the flow and supported codecs.It's a great option for enthusiasts who want to make the most of their home network.
What to do if the TV can’t see the phone?
Addressing problems and delays
Despite the abundance of connectivity, users may encounter technical difficulties, the most common being the desynchronization of sound and image or the occasional twitching of a picture, which almost always indicates problems with the Wi-Fi channel.
If you're using the 2.4GHz band, try switching to 5GHz, which is less crowded by neighborhood routers and microwaves, which allows for more stable data flow. However, remember that the 5GHz range is smaller, so get closer to the router.
Another common problem is the inability to find a device, which can be done by cleaning up the cache of Google Play services and updating Google Play services on Redmi 9, and checking whether the router is limited to the number of simultaneous connections.
- 📶 Update the TV firmware LG via the Settings menu → All settings → Support → Update of the PO.
- 🔌 Turn it off. VPN On a smartphone, as it can block local traffic.
- 🔋 Make sure that the Redmi 9’s power saving mode does not limit the Wi-Fi module.
In some cases, a complete reset of network settings helps. On Xiaomi, you can do this through the Advanced Settings menu → Recover and Reset → Reset Wi-Fi, mobile network and Bluetooth. Don't worry, Wi-Fi passwords will have to be re-entered, but this often solves problems with detection protocols.
💡
Connection stability is more important than maximum speed: 25 Mbps is enough for streaming video in 4K, but the absence of ping jumps (Jitter) is critical.