What is a wireless display and why you need it on Xiaomi Mi TV 4S
Wireless image transfer technology (Miracast, Wi-Fi Direct) allows you to broadcast a smartphone, tablet or laptop screen to a Xiaomi Mi TV 4S without wires. This is convenient for presentations, watching movies from mobile devices or playing games on a large screen. Unlike DLNA or Google Cast, Miracast works directly over Wi-Fi without requiring a connection to the router - devices create their own network.
On the Mi TV 4S (2018-2023 models), the wireless display feature is built into Android TV-based firmware, but many users experience problems when connecting for the first time. The main reasons are: disabled option in settings, incompatibility of Miracast versions or conflict with other network devices. In this article, we will analyze all the activation methods, nuances of connecting from different devices and solving typical errors.
Important: On the Mi TV 4S with firmware below PatchWall 3.0 (2019), Miracast may not be available – a software update is required.
Does your Xiaomi Mi TV 4S support wireless display?
Not all Mi TV 4S versions support Miracast out of the box.
- 📅 Year of issue: models 2018–2023 years (code names) L43M5-5ASR, L55M5-5ASR Support the function. Earlier versions (2017) — no.
- 🔄 Firmware version: PatchWall 2.0 or later is required. → On TV. → POS version.
- 📡 Hardware support: TV should have Wi-Fi 5 GHz (802.11ac). You can specify the characteristics in the documentation or through the Settings menu → Network → Network information.
If your model does not support Miracast, the alternatives are:
- 🔌 Use Google Cast (requires a connection to a single Wi-Fi network).
- 🎮 Buy an external Miracast Dongle adapter (e.g. Xiaomi Mi) TV Stick).
- 🖥️ Connect the device to HDMI supportive MHL (old-fashioned).
Step-by-step: how to turn on the wireless display on Xiaomi Mi TV 4S
Activation of the function takes no more than 5 minutes.
- Turn on the TV and go to the main menu. Open Settings (the pin pin pin in the upper right corner).
- Select Connections and Sharing (or Network and Devices in Old Firmware).
- Scroll to Wireless Display (or Miracast) if you don't have an option, update your firmware (instructions in the next section).
- Activate slider Turn on wireless display, and the TV will start looking for available devices.
- On the source device (smartphone, laptop) enable the screen transfer function (names may differ: Smart View, Screen Mirroring, Projection).
- Select your Mi TV 4S (the name will include a model, such as MiTV-4S-XXXX).
Note: On some firmware, after Miracast activation, the TV may restart – this is normal.
☑️ Preparation for connection
Update firmware: if the option of wireless display is missing
If you don't have Miracast on the menu, you probably have outdated firmware on your TV.
Method 1: via the Internet (recommended)
- Go to Settings → About TV → System Update.
- Click Check Updates. If a new version is available, confirm the download.
- Wait until the TV is finished (the TV will restart automatically).
Method 2: Manually via USB
If the automatic update does not work:
- Download the firmware for your model from the official Xiaomi Support website (section TV → Mi TV 4S).
- Unpack the archive and copy the update.zip file to the flash drive (FAT32 format).
- Put the flash drive in. USB-TV port, then go to Settings → On TV. → Update through USB.
Warning: Do not remove the flash drive or turn off the TV during the upgrade. If a failure occurs, you may need to reset to factory settings.
What to do if the update is suspended?
Connection from different devices: Android, Windows, iOS
Miracast is supported by most modern devices, but there are nuances for each platform.
📱 With Android (smartphone/tablet)
- 🔍 Open the Settings. → Connections → Screen Transfer (Names may differ: Smart View, Screen Mirroring).
- 📺 Choose your Mi. TV 4S Confirm the connection on the TV.
- ⚙️ To reduce delay, activate Game mode in Miracast settings (if available).
💻 Windows. 10/11
- 🖥️ Press Win. + K and select Connect to the wireless display.
- 🔄 If Mi TV 4S not displayed – update the Wi-Fi adapter drivers (via Device Manager).
- 🎮 Use permission for games 1920×1080 frequency-wise 60 Hz (in screen settings).
🍎 S iPhone/iPad (limited support)
Note: Apple does not support Miracast at system level.
- 🔄 Use AirPlay through third-party apps (e.g. ApowerMirror).
- 📱 Connect to Lightning Digital AV Adapter to HDMI-television-port.
💡
If the image on the TV screen "breaks" or slows down, reduce the transmission resolution in the Miracast settings on the source device. The optimal value for the Mi TV 4S is 1280×720 at 30 Hz.
Table: Comparison of Miracast, Google Cast and HDMI
| Characteristics | Miracast | Google Cast | HDMI |
|---|---|---|---|
| Router required | ❌ No. | ✅ Yes. | ❌ No. |
| Delay (MS) | 30–80 | 100–200 | 5–10 |
| Sound support | ✅ Yes. | ✅ Yes. | ✅ Yes. |
| Permission | Up to 1080p. | Up to 4K. | Up to 4K@60Hz |
| Compatibility with iOS | ❌ No. | ✅ Yes (via the annexes) | ✅ Yes (with adapter) |
Common Problems and Their Solutions
Even with the right setup, users experience errors, and here are the most common ways to fix them:
⚠️ Warning: If the TV doesn’t detect the device, check that both devices are disabled VPN And the airplane mode, these functions block local networking.
- 🔌 TV not visible on device list: Restart both devices. Make sure your TV is on Wi-Fi Direct. → Network → Wi-Fi Direct: Check that the smartphone and TV are no more than 5 meters away.
- 🎮 Image delay (lag): Reduce transmission resolution to 720p. Turn off background apps on your smartphone. Use 5 GHz Wi-Fi (less-loaded range).
- 🔊 No sound: Check that the TV has the correct sound source (Settings) → Sound. → Reconnect the device. Update the TV firmware.
💡
If the problem persists after all the manipulations, reset the network settings on the TV: Settings → Network → Network Reset. This will delete all saved connections, but often resolve Miracast conflicts.