Connecting your smartphone to your Xiaomi Mi TV 4S 55 offers a range of possibilities, from watching photos on a large screen to streaming 4K videos without losing quality. However, many users face problems — the TV can not see the phone, the image is slowing down or the sound is lost. In this article, we will discuss all the current ways of connecting (including hidden MIUI functions), give checklists for troubleshooting and explain how to optimize the connection for games and video.
The Mi TV 4S 55 features support for Miracast, DLNA and Xiaomi’s Screen Mirroring protocol, which is more stable than standard solutions. But even if you don’t have a Xiaomi phone, you can connect through universal protocols.
1. Connect via Wi-Fi Direct (Miracast/Screen Mirroring)
This is the most popular way, because it doesn't require cables. Miracast technology is built into the Mi TV 4S 55 and allows you to duplicate the screen of a smartphone with a latency of less than 100 ms - ideal for video and presentations.
- 📶 Provide Wi-Fi speeds not lower than 5 GHz (at a frequency of 2.4 GHz, lags are possible).
- 🔋 Phone charge should be above 30% – when the battery level is low, Android automatically limits Miracast performance.
- 🔄 Update the TV firmware to the version MIUI TV 2.0.14+ (Check in the settings → On TV).
Instructions for Xiaomi/Redmi phones:
- Open Settings → Connection and Sharing → Wireless display.
- Turn on the slider and wait for the device to be found.
- Select your Mi TV 4S 55 from the list. If the TV doesn't show, click Update.
- Confirm the connection on both devices (entry may be required) PIN-code).
For other brands (Samsung, Huawei, etc.), the path may be different. For example, on Samsung, you need to go to Settings → Connections → Wireless display or use the Smart View feature.
Television and phone connected to the same Wi-Fi network|
Wireless display on the phone enabled |
The "Screen Mirror" function is activated on the TV (Settings → Network → Screen Mirror)|
Disabled. VPN Power saving modes on the phone-->
⚠️ Warning: If the image is slowing down, try reducing the phone’s screen resolution to 1280×720 in Miracast settings. TV 4S 55 This is done through settings. → Display and sound → Screen resolution → 720p.
2. Connection through HDMI (play-and-play 4K-content)
If you want maximum image quality (for example, for games or movies) 4K HDR), use HDMI-This method ensures minimal latency and support for all audio formats, including Dolby Atmos.
You'll need:
- 📱 adapter USB-C/HDMI (for modern smartphones, or Micro-USB/HDMI (old-model).
- 🔌 Cable HDMI 2.0 (for 4K@60Hz) or HDMI 1.4 (for 1080p).
- ⚡ Power supply for adapter (some require charging connection).
Step-by-step:
- Connect the adapter to your phone and connect it to your TV via HDMI.
- On the TV, select the signal source: press Input on the remote and select the HDMI port to which the cable is connected.
- A request for permission to transfer an image may appear on the phone - confirm it.
- If the screen is not duplicated, check the phone settings: Settings → Display → HDMI Mode (select Mirror or Extension).
| adapter | Permit supported | Delay (MS) | Sound support |
|---|---|---|---|
| USB-C → HDMI (passive) | Up to 1080p@60Hz | 10–20 | Yeah (stereo) |
| USB-C → HDMI (active, powered) | Up to 4K@30Hz | 5–15 | Yes (including Dolby Digital) |
| Micro-USB → HDMI (MHL) | Up to 1080p@60Hz | 20–30 | Yeah (stereo) |
Important for the Mi TV 4S 55: If you connect your phone via HDMI but the sound is only coming through the smartphone speakers, check the settings of the TV. Go to Settings → Sound → Output and select HDMI ARC or External Speakers.
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If the adapter is not working, try connecting it to the phone before the connection with the HDMI-Some models require this kind of sequence.
3. Connection via USB (MHL/OTG)
If you don’t have Wi-Fi or HDMI-adapter, you can use it USB-But this method has limitations:
- ✅ It only works for viewing photos/video (no screen duplication).
- ❌ Does not support streaming from Netflix, YouTube and other services because of DRM-restraint.
- ⚡ Requires cable. USB OTG (for modern telephones; or MHL (old-model).
Instructions:
- Connect your phone to the TV through USB-port TV 4S 55 it's on the side).
- On the TV, select the USB source using the remote.
- A request will appear on the phone – select File Transfer (MTP).
- Use the TV’s built-in file manager (Media Center) to open your photo/video.
⚠️ Note: When connecting through USB If you're planning a long view, connect the charger to your phone via a phone. USB-hub.
4. Connection through applications (DLNA, Google Cast)
If the built-in methods don’t work, you can use third-party applications, such as Google Home (for Android) or ApowerMirror (a cross-platform solution).
For the Mi TV 4S 55, the following are the best options:
- 📱 Mi Home – Xiaomi’s official smart device management app (includes mirroring feature).
- 🎬 LocalCast – supports streaming local files and YouTube without ads.
- 🎮 Steam Link – to stream games from PC to TV via phone.
Instructions for LocalCast:
- Install LocalCast on your phone from Google Play.
- Connect your phone and TV to the same Wi-Fi network.
- Open the app, select a file to view and click Cast.
- In the list of devices, select your Mi TV 4S 55.
How to eliminate stuttering video when streaming through LocalCast?
5. Connection via Bluetooth (sound only)
If you only need to transmit sound (for example, to listen to music through a TV speaker), you can use Bluetooth.
- 🔊 Only formats are supported SBC and AAC (no aptX or LDAC).
- 🕒 Sound delay can reach 200-300 ms (not suitable for video).
- 📱 Telephone and TV should be at a distance of not more than 5 meters.
How to connect:
- On TV: Settings → Bluetooth → Turn on.
- On the phone: Settings → Bluetooth and select Mi TV 4S 55 from the list.
- After the connection, select the TV as the audio output device in the multimedia settings.
To sync audio with video (e.g. YouTube), use the SoundSync app, which allows you to manually adjust latency.
6. Solving Connection Problems
If your phone is not connected to the TV, check the following points:
| Problem. | Possible cause | Decision |
|---|---|---|
| TV can't see phone over Wi-Fi | Different Wi-Fi networks (2.4/5 GHz) | Connect both devices to the same network (preferably 5 GHz) |
| Image slows down | Weak Wi-Fi signal or network congestion | Restart the router, disconnect other devices from the network |
| No sound when connected via HDMI | Incorrect sound settings on the TV | Select HDMI ARC in Settings → Sound |
| The phone is not charged via USB. | Insufficient USB port power on the TV | Use it. USB-feed-in |
If nothing helps, reset your network settings on your TV:
Settings → Network → Additional → Resetting network settingsAfter reset, reconnect to Wi-Fi and try mirroring again.
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90% of connection problems are solved by restarting your TV and phone. If the bug persists, check firmware updates on both devices.
7.Putting Connection Optimization for Games and Videos
For comfortable gaming or watching movies in 4K, set the following settings:
- 🎮 For games: Use HDMI-cable (delay) < 20 ms. Enable Game Mode on the TV (Settings) → Picture → Image mode → Disable post-processing of video in the phone settings (if you have such an option).
- 🎬 For video: When streaming over Wi-Fi, select permission 1080p (4K It can brake. HDR in the settings of the TV, if the content supports this format. DLNA (for example, VLC kodi).
To test the screen delay, use the Display Lag Test app (available on Google Play). Normal values for the Mi TV 4S 55:
- HDMI: 10-15 ms.
- Miracast: 50-100 ms.
- USB: 30-50 ms (for media files only).