How to Mirror Redmi 9 Screen to TV via Wi-Fi: A Complete Guide with Troubleshooting

Wirelessly broadcasting your smartphone screen to a big TV screen has become a standard feature of modern devices, but users Xiaomi Redmi 9 Often encounter difficulties setting up such a connection. Issues arise due to the variety of protocols (Miracast, DLNA, Google Cast) and differences in firmware. MIUI and limitations of TVs from different brands. This article won't just list the connection methods, but will also explain why a particular method might not work for you, with an emphasis on the nuances specific to your model. Redmi 9.

The main difficulty lies in the fact that Miracast protocol (built into Android) often conflicts with proprietary solutions from TV manufacturers, and alternative methods like DLNA or Google Cast They require additional apps and don't always support audio. We'll examine all three connection options, point out common pitfalls, and offer workarounds for when standard instructions don't work. We'll pay special attention to settings. MIUI 12/13, since they are the ones installed on most Redmi 9.

If you've previously tried connecting and received errors like "Device not supported" or "Unable to connect to screen," this article will explain the specific causes of these errors and how to resolve them. We'll also cover how to bypass these limitations if your TV doesn't support Miracast but does support Wi-Fi Direct or Smart Share.

1. Preparing your smartphone and TV for wireless connection

Before attempting to screen share, please ensure both devices meet the minimum requirements. Redmi 9 availability is critical Android 10+ (This model comes with it installed out of the box MIUI 12 based on Android 10) and support Wi-Fi Direct or MiracastYou can check your Android version in the menu. Settings → About phone → Android version.

On the TV side, the requirements vary:

• 📺 Smart TV on Android TV/Google TV: Supports Google Cast (Chromecast) and Miracast out of the box.
• 📺 Samsung (2016+): requires inclusion Screen Mirroring on the menu Settings → General → External devices.
• 📺 LG (webOS 3.0+): uses proprietary LG Screen Share (Miracast compatible).
• 📺 Old models or "dumb" TVs: an external adapter will be required (eg. Mi TV Stick or Chromecast).

General rules of preparation:

1. Connect both devices to one Wi-Fi network (the exception is Wi-Fi Direct, where the network is created by the TV).
2. Disable VPN, proxy, or power-saving modes on your smartphone—they may be blocking the stream.
3. Update your TV and smartphone firmware to the latest version (in MIUI check in Settings → About phone → System update).

⚠️ Attention: If your TV is connected to the network via cable (Ethernet) and your smartphone is connected via Wi-Fi, streaming may not work. Some models require both devices to be on the same network. wireless networks.

2. Method 1: Connecting via Miracast (Android's built-in function)

Miracast — is a wireless screen sharing standard supported by most modern devices. Redmi 9 The function is hidden in the "Screen Cast" menu and works without any additional apps. However, there is a catch: some TV manufacturers (for example, Samsung) use their own Miracast implementations, which can cause conflicts.

Step-by-step instructions:

1. Activate Miracast reception mode on your TV:
   • For Android TV: Settings → Devices → Screen Sharing.
   • For Samsung: Settings → General → External devices → Screen Mirroring.
   • For LG: Settings → Network → Screen Share.

On Redmi 9 open Settings → Connection and Sharing → Screen Sharing (in some versions MIUI the path may differ: Settings → Advanced → Wireless Display).

Select your TV's name from the list of available devices. If it's not there, refresh the list or check if Miracast is enabled on your TV.

Confirm the connection on both devices. A code may appear on the TV screen; enter it on your smartphone.

Typical problems and solutions:

⚠️ Attention: On some TVs Samsung (J, K, M series) function Screen Mirroring works only with devices SamsungIn this case, use the methods in the following sections.

Make sure your TV supports Miracast|

Connect both devices to the same Wi-Fi network (preferably 5 GHz)|

Disable VPN/proxy on smartphone|

Update Redmi 9 and TV firmware |

Check if your firewall is blocking the connection (in your router settings)

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3. Method 2: Using Google Cast (Chromecast) to stream content

If Miracast isn't working or you only need to cast a specific video/app (not the entire screen), this will work. Google CastThis method requires that the TV supports Chromecast (built in Android TV or through an external device like Google Chromecast). The advantage is lower latency and sound support.

Instructions for Redmi 9:

1. Install the application on your smartphone Google Home (available in Play Market).
2. Connect your TV and smartphone to the same Wi-Fi network.
3. Launch Google Home, click “+” → “Configure device” → “Configure compatible devices”.
4. Select your TV from the list (if it supports Chromecast).
5. To broadcast your screen:
   • Open Settings → Connected devices → Connection and sharing → Screen mirroring.
   • Choose yours Chromecast- device (if it appears in the list).

To cast content from apps (YouTube, Netflix), click the Cast icon (📡) in the player and select the TV.

Important: On Redmi 9 with MIUI 12/13, the "Screen Cast" feature may not support Chromecast devices due to Xiaomi's limitations. In this case, use the app Google Home to broadcast content from supported services (YouTube, Google Photos, etc.), but not the entire screen.

List of apps that support Google Cast Redmi 9:

• 🎬 YouTube (Cast icon in the player).
• 🎵 Google Play Music or YouTube Music.
• 📺 Netflix, Disney+, Twitch.
• 🖼️ Google Photos (broadcast slide show).
• 🌐 Chrome (broadcasting tabs via Menu → Share → Broadcast).

4. Method 3: Transferring media files via DLNA (without screen mirroring)

If you don't need to duplicate the screen, but only play videos/photos/music with Redmi 9 on TV, the protocol will do DLNAIt works on most Smart TVs and doesn't require special adapters. However, DLNA has some limitations:

• ❌ Does not broadcast smartphone screen (only individual files).
• ❌ Not all video formats are supported (for example, .mkv may not be playable).
• ✅ Works even on older TVs with a DLNA server.

How to set up DLNA on Redmi 9:

1. Turn on the DLNA server on your TV:
   • For Samsung: Settings → General → External Devices → DLNA Device.
   • For LG: Settings → Network → DLNA.
   • For Sony: Settings → Network → Home Network.

On your smartphone, install a file manager with DLNA support, for example:

• Mi File Manager (built in MIUI).
• Solid Explorer (DLNA plugin).
• BubbleUPnP (for advanced settings).
• In the file manager, find the "DLNA Devices" or "Network Devices" section and select your TV.
• Select a file to play - it will open on the TV screen.

If your TV is not visible in the list of DLNA devices:

• 🔄 Reboot the router and both devices.
• 📶 Make sure they are connected to the same network (not a guest network!).
• 🔧 Check if your router's firewall is blocking multicast traffic (required for DLNA).

Why doesn't DLNA show some videos?

DLNA uses on-the-fly transcoding, but many TVs don't support formats like .mkv or .flacSolutions:

1. Convert files to .mp4 (H.264) or .avi (Xvid) using applications like VLC or HandBrake.

2. Use Plex or Kodi on TV - they handle non-standard formats better.

3. Connect the flash drive to the TV directly (if the format is supported).

5. Alternative Methods: When Standard Methods Don't Work

If none of the above methods work, consider alternative options. They will require additional devices or apps, but are guaranteed to solve the streaming issue.

Option 1: Using an external adapter

• 📱 Mi TV Stick / Chromecast / Fire TV Stick:
  • Connects to the HDMI port of the TV.
  • Creates its own Wi-Fi hotspot for broadcasting.
  • Supports Miracast and Google Cast.
• 💻 Wi-Fi Display Adapter (eg. Ezcast or Anycast):
  • It works on the Miracast principle, but is compatible with any TV (even without Smart TV).
  • Requires power from the TV's USB port.

Option 2: Software solutions for broadcasting

• 🖥️ ApowerMirror:
  • Broadcasts the screen via Wi-Fi to a PC, which in turn is connected to the TV via HDMI.
  • Supports control from TV (mouse/keyboard).
• 🎮 TeamViewer QuickSupport:
  • Allows you to remotely control your smartphone from your TV (if the TV is equipped with TeamViewer Host).
  • Suitable for presentations or interface demonstrations.

Option 3: Wired connection (if Wi-Fi is unstable)

• 🔌 USB-C to HDMI adapter:
  • Redmi 9 supports image output via USB-C (requires adapter with support DisplayPort Alt Mode).
  • The delay is minimal, but the audio can be transmitted separately via Bluetooth.

⚠️ Attention: When using Wi-Fi Display adapters (e.g. Anycast) a delay of up to 1-2 seconds may occur. This is normal for the Miracast protocol and cannot be corrected by settings. For games or videos with fast scenes, it is better to use a wired connection.

6. Solving common errors when connecting Redmi 9 to a TV

Even with proper configuration, users Redmi 9 We often encounter errors. Let's look at the most common ones and how to fix them.

Error 1: "Device not supported" when connecting via Miracast

• Cause: The TV uses a proprietary version of Miracast (eg. Samsung Screen Mirroring), incompatible with the standard implementation in MIUI.
• Solution:
  • Use Google Cast (if the TV supports it).
  • Install the app on TV Miracast Receiver (For example, Screen Mirroring Receiver from Play Market for Android TV).
  • Update your TV's firmware—manufacturers sometimes add support for standard Miracast.

Error 2: "Unable to connect to the screen"

• Cause: IP address conflict, multicast traffic blocked by the router, or active power saving mode on the smartphone.
• Solution:
  • Reboot the router and both devices.
  • Enable it in your router settings. IGMP Snooping And Multicast (usually in the section LAN or Wi-Fi).
  • Turn off power saving mode in Settings → Battery → Power saving mode.

Error 3: Sound is transmitted, but there is no image (or vice versa)

• Cause: Limitations of the Miracast protocol or TV codecs.
• Solution:
  • Try a different connection method (e.g. DLNA for audio + Miracast for image).
  • Install a player on your TV that supports all codecs (for example, VLC or Kodi).
  • Convert files to standard formats (.mp4 with codec H.264).

Error 4: Lag during broadcasting

• Cause: Weak Wi-Fi signal, congested network, or Miracast protocol limitations.
• Solution:
  • Connect to the network 5 GHz (less busy than 2.4 GHz).
  • Reduce the broadcast resolution in the Miracast settings (if there is such an option).
  • Disconnect other devices from Wi-Fi while broadcasting.
  • Use a wired connection (USB-C → HDMI).

7. Optimize your Wi-Fi network for stable streaming

The quality of your screencast directly depends on the state of your Wi-Fi network. Even if the connection is successful, lags and interruptions are often related to your router settings. Here are the key parameters to check:

1. Wi-Fi frequency

• 📶 2.4 GHz: Longer range, but susceptible to interference and low throughput. Suitable for broadcasting static images (photos, presentations).
• 📶 5 GHz: Less interference, higher speed, but a smaller range. Ideal for video and gaming.

🔹 Recommendation: For Redmi 9 and use the TV 5 GHz, if both devices are in the same room. If the signal is weak, switch to 2.4 GHz, but reduce the broadcast quality.

2. Wi-Fi channel

• By default, routers select a channel automatically, but it may be overloaded by neighboring networks.
• Use apps like Wi-Fi Analyzer (Android) to find the least crowded channel.
• In the router settings (usually 192.168.1.1 or 192.168.0.1) manually set the free channel.

3. Router operating mode

• If your router supports 802.11ac (Wi-Fi 5), turn it on - this will increase speed and stability.
• Turn it off WMM (Wi-Fi Multimedia), if the broadcast is interrupted - sometimes this helps with conflicts with Miracast.

4. QoS (Quality of Service) settings

• Turn on QoS in the router settings and set the maximum priority for Redmi 9 (by MAC address).
• This ensures that your streaming traffic won't be swamped by other devices (such as torrents or online games).

Router parameter	Recommended value	Where to change
Wi-Fi mode	802.11ac (or 802.11n for older devices)	Wireless Network → Operating Mode
Channel width	40 MHz (for 5 GHz) or 20 MHz (for 2.4 GHz)	Wireless Network → Channel
WMM (Wi-Fi Multimedia)	Included (but if there are lags, try disabling it)	Additional Wi-Fi settings
IGMP Snooping	Included (important for DLNA and Miracast)	Local Area Network → Multicast
QoS	Included with priority for MAC address Redmi 9	Traffic Management → QoS

⚠️ Attention: Router settings may vary depending on the model and firmware. If you are unsure about changes, make a backup copy of the configuration before editing (usually in the System → Backup).

FAQ: Frequently asked questions about connecting the Redmi 9 to a TV

My TV doesn't support Miracast. What should I do?

If your TV does not have built-in Miracast support (for example, older models Samsung or LG), you have several options:

• 📺 Buy an external adapter like Mi TV Stick, Chromecast or Anycast (connects to HDMI port).
• 💻 Use your PC/laptop as a mediator: screencast Redmi 9 to your computer via Wi-Fi (via ApowerMirror or TeamViewer), and then connect the PC to the TV via HDMI.
• 🔌 Connect your smartphone to your TV via USB-C → HDMI adapter (if the TV supports it) MHL or DisplayPort Alt Mode).

The most universal solution is Chromecast or Mi TV Stick, as they work with any TV that has an HDMI port.

Why is there no sound when connecting via Miracast?

No sound when streaming via Miracast is a common problem related to:

• 🔇 TV limitations (some models do not support Miracast audio transmission).
• 🔇 Codec conflict (for example, the TV does not play AAC or Dolby Digital).
• 🔇 Settings MIUI (In some versions, the sound is disabled by default).

Solutions:

• Try a different connection method (eg. Google Cast or DLNA).
• Connect external speakers or a soundbar to your TV HDMI ARC or optical cable.
• Use a Bluetooth speaker connected to your smartphone.

Is it possible to play games with streaming to TV?

Technically yes, but with some caveats:

• ✅ Miracast/Google Cast: there will be a noticeable delay (lag), which is critical for dynamic games (shooters, racing).
• ✅ Wired connection (USB-C → HDMI): minimal lag, but requires an adapter with support DisplayPort Alt Mode.
• ✅ Steam Link: If the game is installed on a PC, you can stream gameplay to your TV via Steam Link (Android app).

For a comfortable gaming experience, it is better to use a wired connection or an external adapter with support Game Mode (For example, Razer Kishi + HDMI).

How do I mirror my screen if my TV is connected via cable (Ethernet) and my smartphone is connected via Wi-Fi?

Many TVs require both devices to be in one wireless network For Miracast/DLNA. If your TV is connected via cable and your smartphone is connected via Wi-Fi, try: