Connecting your smartphone to your Xiaomi Mi TV 4S 55 offers a range of possibilities, from watching photos on a big screen to streaming 4K videos or playing with your TV as a monitor. However, not everyone knows that the way you connect depends on your phone model, the TV firmware version, and even the type of content. For example, Miracast is available for Android devices, and for iPhone only AirPlay through third-party apps.
In this article, we will discuss 5 proven connection methods (including hidden features). MIUI TV), We'll tell you how to avoid common errors like "Device not found" or "No sound", and give you recommendations for optimizing the image. TV 4S 55 – Wi-Fi Direct support even without a router, which distinguishes it from many budget models of other brands.
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1. Wi-Fi connection (Screen Mirroring / Miracast)
The most versatile way is to wirelessly stream the screen via Miracast (for Android) or Screen Mirroring (for iOS). Xiaomi Mi TV 4S 55 supports both protocols, but there are nuances:
On Android smartphones (such as the Redmi Note 12 or POCO X5), the feature is called “Wireless Display” or “Transmit” (depending on the version of MIUI), the main condition is that both devices must be connected to the same Wi-Fi network (or use Wi-Fi Direct if the router is not available).
Instructions for Android:
- 📱 Open the Settings. → Connections → Wireless display (or Transmit in the notification curtain).
- 📺 On the Mi remote. TV press Menu → Settings → Connection and sharing → Wireless display.
- 🔄 In the list of available devices, select the name of your TV (for example, MI-TV-4S-55-XXXX).
- ✅ Confirm the connection on both devices.
If the phone screen is not displayed:
- 🔌 Restart your router – sometimes the problem is blocking multicast traffic.
- 📶 Check that the TV is enabled with the "Allow Connection" mode in Miracast settings.
- 🔄 Update the TV firmware to the latest version (current for 2026 — MIUI TV 3.0+).
⚠️ Note: When connecting your iPhone through third-party apps, you may experience a delay of up to 0.5-1 seconds. To sync audio and video, select Game or Low Latency mode in the application settings".
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Connection via HDMI (for maximum quality)
If you need to stream video in 4K@60Hz without loss of quality or play mobile games on a large screen, HDMI is the best choice.
- 📱 Smartphone with support HDMI Alt Mode (most flagships Xiaomi, Samsung, OnePlus).
- 🔌 Cable USB-C → HDMI (adapter + standard HDMI-cable).
- 📺 Free port HDMI on the back of the Mi TV 4S 55 (marked HDMI 1/ARC or HDMI 2).
Step-by-step:
- Connect the cable to the phone and TV.
- On the Mi TV remote, select the signal source: press Input → HDMI 1/2.
- On the smartphone in the curtain notifications will appear option "HDMI-output - activate it.
- If the image does not appear, check that the settings of the TV enabled the "Game" mode (for minimal delay).
| Parameter | USB-C → HDMI | Micro-USB → HDMI |
|---|---|---|
| Max, permission. | 4K@60Hz | 1080p@30Hz |
| Support for HDR | Yes. | No. |
| Delayed input | 10-20 ms. | 30-50 ms |
| Charging the phone | Yes (via USB-C) | No. |
⚠️ Note: On some smartphones (e.g. Redmi) 9A) port USB-C supportive HDMI Alt Mode. Check the specifications of your model at Mi.com.
The cable supports 4K (see the "High Speed HDMI" label).
The phone is unlocked (on some models) HDMI-output is blocked when the screen is blocked)
The right signal source is selected (HDMI 1/2)
In the settings of the phone enabled mode "For developers" → "Debugging by HDMI" (if any)
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3. USB connection (for files and charging)
If you need to view a photo / video from your phone or charge it while watching, it is suitable. USB-cable. TV 4S 55 supports two modes:
- MTP (Media Transfer Protocol) – to access your phone files.
- Charging – if the cable is connected to the USB 3.0 port on TV (blue connector).
How to connect:
- Connect your phone and TV with a USB-A → USB-C (or Micro-USB) cable.
- On the Mi remote. TV Open the settings. → Devices → USB-device.
- Select "Open files" - the conductor with the phone folders will open.
- To play the video, select the file and press OK on the remote.
Limitations:
- 🎵 Music and video are only played in supported formats (MP4, MKV, MP3).
- 📸 Photo in HEIC (iPhone format will not show up – you need to convert to JPG.
- 🔋 Charging through USB 2.0 (black port) is very slow (0.5A).
How to convert HEIC to JPG on iPhone?
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4.Using DLNA and streaming apps
If you do not need to duplicate the screen, but only transfer photos, videos or music, it is most convenient to use the screen. DLNA-server or specialized applications. TV 4S 55 has built-in support DLNA, Pre-installed services like Mi Home and Xiaomi Video.
Streaming methods:
- 📱 Through Mi Home: Open the app on your phone → Choose a TV → "Send the file".
- 🎬 Through Google Photos: Click "Translation" → Choose Mi. TV list.
For iPhone, it's fine.
- 🍎 Infuse - Supports DLNA and almost all video formats.
- 🍎 nPlayer - can broadcast on Mi TV convertible.
| Annex | Android | iOS | 4K support |
|---|---|---|---|
| Mi Home | Yes. | Yes. | Yes. |
| Google Photo | Yes. | Yes. | No (1080p) |
| VLC | Yes. | Yes. | Yeah (with HEVC) |
| Infuse | No. | Yes. | Yes. |
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If the video slows down when streaming over Wi-Fi, reduce the bitrate in the application settings or connect the phone to the router via cable (if supported).
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5. Hidden features: Game Mode and low latency
If you connect a phone for gaming (e.g. via Xbox Cloud Gaming or Steam Link), it is important to minimize input latency. Mi TV 4S 55 has a hidden "Game Mode" that reduces input lag to 10-15ms.
How to turn on:
- Connect your phone to HDMI or Miracast.
- On the remote, press Menu → Picture → Image mode.
- Choose "Game".
- Activate the “Low Latency” option.
Additional settings for gamers:
- 🎮 Turn off post-processing: Settings → Picture → Movement → Off.
- 🔊 Set the sound to Direct Sound for synchronization.
- 📶 If you play Miracast, connect your phone to your router via cable (if possible) for stability.
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For minimum delay, use a combination: HDMI-cable + Game Mode + And then the lag is comparable to a PC monitor.
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6. Solving common problems
Even with the right connection, there can be errors.-5 problems and solutions:
1. The TV can't see the phone over Wi-Fi:
- 🔄 Reboot both devices.
- 📶 Check that they are connected to the same network (not to the guest network!).
- 🔧 On the TV, reset network settings: Settings → Network → Reset.
2. No sound when connecting via HDMI:
- 🔊 On the phone in the sound settings select "HDMI" output-wise.
- 🔌 Check that the cable supports audio (some cheap adapters only transmit video).
- 📺 On TV in Settings → Sound. → Choose the exit. HDMI ARC.
Lags and brakes during streaming:
- 📶 Connect your phone to the router via cable (if supported).
- 📵 Reduce the broadcast resolution in Miracast settings to 720p.
- 🔄 Close the background apps on your phone.
4.The TV says "Unsupported format":
- 🎬 Convert the video to MP4 (H.264) with HandBrake.
- 📁 Transfer the file to USB-drive and play through Mediaplayer on TV.
5. the phone screen does not fit on the TV (cut off):
- 📱 In Miracast settings on your phone, select "Facing under the screen".
- 📺 On TV in Settings → Screen. → Size of the image select "Auto".
⚠️ Note: If, after connecting to HDMI The phone is getting hot, so you can turn it off from charging, and some adapters are running too high a current, which causes you to overheat (especially on budget models like the Redmi). 10A).
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