Broadcasting the screen from Xiaomi Redmi Note 9 to the TV opens up new possibilities for watching movies, games or presentations on the big screen. However, not all users know that you do not need to buy expensive adapters for this โ modern Xiaomi smartphones support several built-in wireless and wired image transfer technologies. In this article, we will analyze all the current methods, from standard Miracast to alternative solutions like Google Cast or USB-Cast connection โ HDMI.
It's important to consider that the choice of method depends on the model of your TV, the version of MIUI on your smartphone, and even the firmware of the TV. For example, old LG or Samsung may not support Wi-Fi Direct, but they work with DLNA without problems. But Xiaomi Mi TVs are optimized for the brand ecosystem and offer the simplest possible synchronization. We tested all the options on the Redmi Note 9 (version of MIUI 14) and collected step-by-step instructions for typical user errors.
1. Wireless broadcast via Miracast (built-in feature)
Miracast is a wireless screen transmission standard supported by most modern Xiaomi TVs and smartphones, which does not require an Internet connection, as it creates direct communication between devices over Wi-Fi Direct, the main advantage of which is minimal latency (up to 50 ms), which is critical for games or video.
To activate the broadcast:
- ๐ฑ Open the Settings. โ Connection and sharing โ Screen transfer to Redmi Note 9.
- ๐บ On the TV, turn on Miracast mode (in the menu "Source" or "Network" - the name depends on the model).
- ๐ In the list of available devices on your smartphone, select the name of your TV.
- โ Confirm the connection on both devices (entry may be required) PIN-code).
If the TV is not on the list, check:
- ๐ Restart both devices โ sometimes resetting network settings helps.
- ๐ถ Make sure your TV is enabled with Wi-Fi Direct (in some Sony models, it is hidden in the Network menu). โ Additionally").
- ๐ง Update your TV firmware โ older versions may not support protocols MIUI 12+.
โ ๏ธ Attention: Redmi Note 9 with MIUI 11 and below may not be available to Transfer screen in the main settings, in which case use the Screen Mirror app from Google Play or update the firmware.
2. Use of Google Cast (Chromecast or Built-in)
If your TV supports Google Cast (such as Android TV models or a Chromecast connected), you can stream individual apps or the entire screen, a method that is convenient for streaming videos from YouTube, Netflix or Google Photos, as it allows you to continue using the phone while youโre streaming.
Instructions for Redmi Note 9:
- Connect your phone and TV to the same Wi-Fi network.
- Open an app that supports Google Cast (like YouTube).
- Click the broadcast icon (๐ก) and choose your TV.
- To mirror the entire screen: go to Settings โ Connected devices โ Connect to the device and select the TV.
Limitations of the method:
- ๐ฎ Latency can reach 200-300 ms โ not suitable for dynamic games.
- ๐ถ Requires stable Wi-Fi (speed from 5 Mbps).
- ๐ Not all applications support Cast (e.g. TikTok or Cast). VK Video).
Make sure your TV and phone are on the same Wi-Fi network
Update YouTube/Netflix to the latest version
Enable the option "Screen Transfer" in the settings of the TV
Check the Internet speed (minimum 5 Mbit / s)-->
3. Wired connection via USB-C โ HDMI
For minimal latency and maximum image quality (up to 4K@60Hz), wired connection via USB-C โ HDMI adapter is ideal for gamers or graphics professionals. However, Redmi Note 9 does not support DisplayPort Alt Mode out of the box, so you will need to:
- ๐ Supported adapter MHL (for example, Xiaomi USB-C to HDMI).
- โก Power supply for adapter (some models require charging connection).
Step-by-step:
- Connect the adapter to the USB-C port of the smartphone.
- Connect the adapter to the TV via HDMI.
- On the TV, select the appropriate HDMI-entrance.
- On the smartphone may appear a request for permission to transfer the image โ confirm it.
| Parameter | Miracast | Google Cast | USB-C โ HDMI |
|---|---|---|---|
| Delay (MS) | 30โ50 | 200โ300 | 10โ20 |
| Max, permission. | 1080p | 1080p | 4K |
| Wi-Fi required | No. | Yes. | No. |
| Sound support | Yes. | Yes. | Yes (via HDMI) |
โ ๏ธ Note: When using cheap adapters USB-C โ HDMI It's possible that there's artifacts or no sound. RTD2173 or MStar MSC313E.
4. Broadcasting via DLNA (for media files)
DLNA is a protocol for transmitting media files (video, photos, music) over a local network. Unlike screen mirroring, it allows you to play content directly on your TV without downloading your smartphone processor. Redmi Note 9 has a built-in Media Player app or third-party solutions like BubbleUPnP for this.
How to set up:
- Connect your phone and TV to the same Wi-Fi network.
- Turn it on on the TV. DLNA-server (in the menu "Network" or "Multimedia").
- On your smartphone, open the Gallery or Media Player, select a file and click "Transmit to the device".
- In the list, select your TV.
Advantages of DLNA:
- ๐ฌ Support for formats MKV, MP4, FLAC convertible.
- ๐ฑ Low load on the smartphone battery (file is transferred once).
- ๐ Ability to control playback from the phone (pause, rewind).
What formats does DLNA support on Xiaomi Redmi Note 9?
5. Alternative broadcasting applications
If the built-in methods don't work, you can use third-party apps, and we tested three of the most reliable options for the Redmi Note 9:
- ๐บ ApowerMirror โ supports screen mirroring and control from the TV (latency) ~100 ms. Requires the installation of the server part on TV.
- ๐ฎ TeamViewer QuickSupport - an unusual solution for broadcasting the screen over the Internet (useful for remote assistance).
- ๐ฑ LocalCast โ specializes in transferring media files with support for subtitles and playlists.
To set up ApowerMirror:
- Download the app to your phone and TV (if itโs Android TV).
- Connect both devices to the same network.
- On the phone, press "M" and select the TV.
- Allow access to notifications (necessary for proper operation).
โ ๏ธ Note: Apps like ApowerMirror can request permission to access files and cameras. Check reviews on Google Play before installing them - some versions contain ads that interfere with the streaming.
๐ก
If Miracast is permanently interrupted, try setting your router to set a fixed Wi-Fi channel (e.g. 6 or 11) instead of Auto mode, which will reduce interference from other devices.
6. Solving broadcasting problems
Even with the right setup, Redmi Note 9 users are faced with common errors, and here are the most common ways to fix them:
| Problem. | Possible cause | Decision |
|---|---|---|
| The TV is not displayed in the list of devices | Wi-Fi Direct is disabled on TV | Turn Miracast on the TV menu |
| The mirror works, but without sound. | Incompatible HDMI adapter | Use an adapter with HDMI ARC support |
| Video lagging or slowing down | Weak Wi-Fi signal | Reconnect to 5 GHz network or use a wired connection |
| Applications are not broadcasted via Cast | DRM Blocking (for example, on Netflix) | Update the app or use Miracast |
If none of the methods worked:
- ๐ Restart your router โ sometimes conflicts IP-addresses block broadcasting.
- ๐ฑ Reset network settings on your smartphone: Settings โ System system โ Reset โ Resetting Wi-Fi and Bluetooth settings.
- ๐บ Update the TV firmware (especially relevant for Samsung Tizen until 2019).
๐ก
For stable Wi-Fi broadcasts, use the 5 GHz band, which is less crowded and provides more bandwidth than 2.4 GHz.