How to Connect Your Phone to a Xiaomi Redmi 9T TV: All Ways (2026)

Connecting a smartphone to a Xiaomi Redmi TV 9T It's a great opportunity, from viewing big screen photos to streaming high-resolution videos, but not everyone knows that the way you connect depends not only on the phone's model, but also on the year you release the TV, its operating system (Android). TV, Google TV Or proprietary firmware PatchWall from Xiaomi) and even from the version HDMI-In this article, we will discuss all the current synchronization methods, including wireless and wired ones, taking into account the features of Redmi. 9T.

It’s important to understand that the Redmi 9T supports Miracast (the wireless standard for screen duplication), but not all Xiaomi TVs work correctly with this technology due to the manufacturer’s limitations. For example, the budget models of the Mi TV 4A series may require additional settings, while the flagship Mi QLEDs connect automatically. We tested all methods on Xiaomi TVs from 2020-2026 and highlighted key nuances that save time.

If you've tried to connect before and you've encountered errors like "Device Unconnected" or "Miracast Unsupported," there's a section in the article that addresses typical problems, and we've also compared data rates and image quality across different types of connections, which is collected in the table below.

HDMI Connection: Wired Method for Maximum Quality

Wired connection through HDMI It's the most reliable way to transmit video and sound without delay. 9T You'll need an adapter. USB-C → HDMI, Because the smartphone does not have a full size HDMI-It is important to choose an adapter with support. HDMI 2.0 — This ensures that the image is displayed in resolution before 4K@30Hz (maximum for Redmi) 9T).

Connection algorithm:

• 🔌 Connect the adapter. USB-C → HDMI phone-in.
• 📺 Connect. HDMI-cable with TV (use a port marked with a note) HDMI ARC sound-transmitter).
• 🔄 On the TV, select the source of the signal: HDMI 1/2/3 (port-by-port).
• 📱 The phone will be notified “Connected to” HDMI» — confirm the screen duplication.

If the image does not appear:

⚠️ Note: Some Xiaomi TVs (e.g. Mi) TV P1) You must manually activate the HDMI-CEC in settings: Settings → Devices and accessories → HDMI-CEC. Without it, the phone may not be recognized.

Redmi 9T fails to HDR through HDMI-Adapter – the picture will be in the standard SDR, Even if the TV is still on HDR10. That's a limitation of the hardware of the smartphone, not the adapter. HDR-Use wireless methods (see Section 3).

Choose an adapter with DisplayLink chip or official from Xiaomi|

Check the HDMI cable for damage |

Enable Developer Mode and Activate HDMI Debugging (optional)|

Reboot your phone if the screen is not duplicated

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2. Wireless Wi-Fi connection (Miracast and Google Cast)

Wireless technologies are convenient for streaming videos or presentations, but can suffer from delays (latency) up to 100-200 ms. Redmi 9T supports two protocols:

• Miracast – Duplication screen without the Internet (works on most Xiaomi TVs).
• Google Cast – transfer of individual applications (YouTube, Netflix) over Wi-Fi.

To turn on Miracast:

1. Open Settings → Connections and Sharing → Screen Transfer.
2. Select your TV from the list (e.g. Mi TV 5 Pro).
3. Confirm the connection on both devices.

For Google Cast:

• 📱 Make sure your phone and TV are connected to the same Wi-Fi network.
• 🎬 In the app (e.g. YouTube) click the Cast icon (📡) and choose the TV.

⚠️ Note: Xiaomi TVs with PatchWall firmware before version 3.0 may not support Miracast. Update TV software via Settings → On TV. → Updating the system.

3. USB Connection: for charging and transferring files

USB-The connection is suitable for viewing photos/video from your phone or charging the device while watching. 9T does not support the output of the image USB (Unlike some of Xiaomi's flagships, you can instead:

• 📁 Viewing your phone files on your TV as an external drive.
• 🔋 Charge the phone (power depends on the port) USB TV-wise).

Instructions:

1. Connect your phone to your TV with a USB-C → USB-A cable.
2. On your phone, select File Transfer (FTP) mode.
3. On the TV, open the File Manager → USB-device.

Limitations:

• ❌ No screen duplication, only access to files.
• ❌ Video in.mkv or 4K It may not be available due to the limitations of the TV.

4. Comparison of methods of connection: what to choose?

Each method has pros and cons. Below is a table with key parameters for the Xiaomi Redmi 9T:

HDMI is optimal for gaming or watching movies in high resolution. If mobility is important, choose Miracast, but consider possible lags. Google Cast is more convenient for streaming content from apps (YouTube, Disney+).

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HDMI is the best choice for stability, Miracast is for fast wireless connectivity, and Google Cast is the best choice for streaming from apps.

5. Solving typical connection problems

Even with the right settings, there can be errors.

Problem 1: The TV can't find the phone through Miracast.

• 🔄 Reboot both devices.
• 📶 Make sure your phone’s Wi-Fi is on (even if there’s no network).
• 🛠️ Update the TV firmware (relevant for models until 2022).

Problem 2: There is no sound when connecting via HDMI.

• 🔊 Check that the cable is connected to the port. HDMI ARC.
• 📱 On the phone in the sound settings, select Output through HDMI.
• 🔧 In the TV menu, open the sound settings → Outlet port → HDMI.

Problem 3: Miracast video is slowing down.

• 📶 Switch to 5GHz Wi-Fi (2.4GHz may not be able to handle the flow).
• 📱 Close the background apps on your phone.
• 🖥️ Reduce screen resolution in Miracast settings to 720p.

⚠️ Note: If Xiaomi TV is released before 2019, it may not support Miracast due to an outdated Wi-Fi module. HDMI or purchase of an external adapter (e.g., Mi). TV Stick).

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If Miracast is permanently off, try turning off battery savings for the Screen Transfer app in your phone's settings.

6. Alternative ways: Chromecast and third-party apps

If the built-in methods do not work, you can use external devices or software:

1. Google Chromecast

• 📦 Connect Chromecast to HDMI-television-port.
• 📱 Install the Google Home app on your phone.
• 🔄 Follow the instructions for setting up in the application.

2. Streaming applications

• 🎥 ApowerMirror – Screen duplication over Wi-Fi.
• 📺 LocalCast – transferring video/photo to TV.
• 🎮 Steam Link – for streaming games from PC to TV via phone.

The Benefits of Chromecast – Support 4K HDR It is a stable job, but it is an additional expense (from 3 000). ₽). Free apps like ApowerMirror can have resolution restrictions or display ads.

7. Sound setting when connected

A common problem is that the sound is only coming through the phone, not the TV.

For HDMI:

• 🔊 On the phone: Settings → Sound. → Sound output → HDMI.
• 📺 On TV: Settings → Sound. → Outlet port → HDMI ARC.

For Miracast/Google Cast:

• 🎵 The sound is transmitted automatically, but if it is not, check the volume on the TV.
• 🔇 In some applications (e.g, VLC) You need to manually select the audio output.

If you use a Bluetooth speaker connected to your TV, the sound may be duplicated or lost, in which case, turn off the speaker or prioritize the audio devices in the TV menu.

FAQ: Frequent questions