Xiaomi TV 4S (L43M5-5ASU, L50M5-5ASU, and others) supports several ways to wirelessly and wiredly connect smartphones, from standard Miracast to proprietary technologies like Mi Share. However, many users face problems: the phone does not find the TV, the screen is duplicated with a delay, the sound disappears. In this article, we will analyze all the current ways of connecting (including hidden functions of MIUI TV), as well as typical errors and their solutions.
Important: the instruction is suitable for all modifications of Xiaomi TV 4S (2018-2023 release years) based on Android TV 9.0/10.0 and PatchWall. If you have a newer model (for example, Xiaomi TV A2 or Xiaomi TV Q2), some of the functions may differ - check the version of the software in the settings (Settings → About TV).
1. Wi-Fi connection (Miracast/AirPlay)
The most universal method is wireless screen broadcasting via Miracast (for Android) or AirPlay (for iPhone), which is built into the system on Xiaomi TV 4S, but it must be activated beforehand.
To turn on Miracast on your TV:
- Open Settings → Connections and Sharing → Wireless display.
- Activate the switch "Wireless display".
- Select the “Always on” mode (if you want the TV to be visible all the time) or “Only when requested”.
On a smartphone (Android 8.0+):
- 📱 Open the Settings. → Connections → Screen broadcast (the name may differ from Smart View, Wireless Display, etc.).
- 🔍 In the list of available devices, select your Xiaomi TV 4S (type-name MI-TV-XXXX).
- ⚙️ Confirm the connection on the TV (a request will appear with the PIN-code).
For iPhone (iOS 12+):
- 📱 Swipe down from the upper right corner to open the Control Point.
- 🔄 Click on Screen Duplication (or Screen Mirroring»).
- 📺 Choose your Xiaomi TV 4S list.
⚠️ Note: If the TV doesn't appear on the device list, check that both devices are connected to the same Wi-Fi network (even if you use Miracast). TV 4S This function only works with an active internet connection.
What to do if the image is lagging?
2. Wired connection via HDMI (for Android and iPhone)
If wireless methods are unstable, use them. HDMI-You'll need a cable with an adapter:
- 📱 For Android: cable USB-C → HDMI (adapter + standard HDMI-cable).
- 🍎 For iPhone: the official Lightning adapter → HDMI (or USB-C → HDMI iPhone 15+).
Step-by-step:
- Connect the adapter to the smartphone, and HDMI-cable HDMI 1/2/3 on the back of Xiaomi TV 4S.
| The device | Required adapter | Max, permission. | Sound support |
|---|---|---|---|
| Android (USB-C) | USB-C → HDMI | 4K@30Hz | Yes. |
| iPhone (Lightning) | Lightning → HDMI (official) | 1080p@60Hz | Yes. |
| iPhone 15+ (USB-C) | USB-C → HDMI | 4K@60Hz | Yes. |
| Android (Micro-USB) | Micro-USB → HDMI (MHL) | 1080p@30Hz | Yes |
* Micro-USB may require additional power to the adapter.
⚠️ Attention: On Xiaomi TV 4S firmware-less TV 10. HDMI-The solution is: in the settings of the TV (Settings) → Sound. → Exit HDMI) select mode «PCM» instead of Auto».
Is an original/certified adapter used?
Is the cable connected to the HDMI 2.0 port (on the back of the TV)?
Is HDMI-CEC enabled in the TV settings?
- Is the software updated on the TV and smartphone?-->
3. USB connection (file transfer and management)
If you do not need to duplicate the screen, but simply transfer files (photos, videos, music) or control the TV as an external drive, use the device. USB-cable. TV 4S regime-support MTP (for Android and PTP (photo).
How to connect:
- Connect your phone and TV with a USB-A → USB-C/Micro-USB cable (use the USB 2.0 port on the back of the TV).
- There will be a notification on the TV «USB-Device connected – select “Open files».
- On your smartphone (Android) select the connection mode: 📁 File transfer (MTP) — phone-memory. 📷 Transmission of photographs (PTP) — image-only.
Limitations:
- ❌ iPhone does not support connection USB Xiaomi TV 4S (computer).
- ❌ Some Android models may not be recognized – check compatibility in the developer settings (For developers) → Configuration USB).
- ⚠️ Transmission speed is limited USB 2.0 (up to 480 Mbps).
1. use another cable (preferably original).
2. Reboot both devices.
3. Enable USB debugging on your phone (Settings → About Phone → Assembly Number → 7 taps → Developer Settings → USB debugging).
4. Update the TV firmware to the latest version (in some assemblies bugs with the USB).-->
4. Branded technologies: Mi Share and Mi Home
Xiaomi offers its own solutions for communication between the devices of the ecosystem – Mi Share (fast file transfer) and Mi Home (smart home management). On Xiaomi TV 4S, these features work with limitations, but allow you to do without third-party applications.
Mi Share (for file transfer):
- On your TV, open Settings → Connections & Sharing → Mi Share and activate the feature.
- On a smartphone (with MIUI 12+ or the Mi Share app from Google Play), select files and click “Send”.
- In the list of devices, select your Xiaomi TV 4S.
Mi Home (for smartphone TV control):
- 📱 Install the Mi Home app on your phone.
- 🔗 Connect your TV to your Xiaomi account (Settings) → Account and security).
- 📺 In the Mi Home app, add a TV as a new device (Smart Home section»).
⚠️ Note: Mi Share feature on Xiaomi TV 4S It works in an unstable way with phones not on MIUI (For example, Samsung, iPhone. Use alternatives like Send Anywhere or Xender.
5. Alternative methods: DLNA and third-party applications
If standard methods don’t work, use DLNA protocols or streaming apps.
DLNA (for transfer of media files):
- Turn it on on the TV. DLNA-server: Settings → Network services → DLNA.
- On your smartphone, install a media server application (for example, BubbleUPnP or VLC).
- In the app, select files to play and specify Xiaomi TV 4S as the target device.
Screen duplication applications:
- 🎮 ApowerMirror – for gamers (minimum delay).
- 📺 TeamViewer QuickSupport – Remote Assistance.
- 🎬 LocalCast – for streaming video from your phone.
| Method | Delay. | Quality. | Difficulty setting up |
|---|---|---|---|
| Miracast | Medium (100-300 ms) | Up to 1080p@60Hz | Low. |
| HDMI | Minimum (20-50 ms) | Up to 4K@30Hz. | Medium |
| DLNA | High (500+ms) | Up to 1080p. | Tall. |
| Mi Share | No duplication | Original | Low. |
6. Solving common problems
If the connection is not working, check the following points:
The TV is not visible in the list of devices:
- 🔌 Make sure both devices are on the same Wi-Fi network (even for Miracast).
- 🔄 Restart router and TV.
- 📱 On the phone, turn on “Developer Mode” and activate “Debugging over Wi-Fi».
No sound when you connect:
- 🔊 On the TV, check the sound settings: Settings → Sound. → Exit HDMI → PCM.
- 📵 Turn off Bluetooth headphones on your phone.
- 🔄 Reconnect the devices.
Image brakes or tears:
- 📶 Switch to 5GHz Wi-Fi (if the router supports).
- 📱 Close the background apps on your phone.
- 🖥️ Reduce the broadcast resolution in Miracast settings.
💡
If neither method works, upgrade the TV firmware to the latest version. In older builds (e.g. Android) TV 9 on early Xiaomi TV 4S) There are many bugs with Miracast and USB-connection.
7. Comparison of methods: which one to choose?
The choice of method depends on your task:
- 🎮 For games: only HDMI (Minimum delay or ApowerMirror.
- 🎬 For movies: DLNA LocalCast (the best quality).
- 📁 For file transfer: Mi Share or USB (MTP).
- 📱 For screen duplication: Miracast (Android) or AirPlay (iPhone).
If you need a stable connection without delay, the best option is — HDMI-You can use a cable to transfer files or watch videos, or Mi Share. DLNA. Wireless screen duplication (Miracast) is convenient, but can slow down with weak Wi-Fi.