Using a smartphone as a multimedia hub is standard practice for most Xiaomi gadget owners. Often there is a need to display the image on the big screen, but wireless technology can work unstable or require complex network configuration. In such situations, a direct wire connection comes to the rescue through USB-This not only ensures stable data transfer, but also allows the device to be charged while viewing.
There are several ways to do this, from simply copying files to fully streaming the screen in real time, depending on the version of the MIUI or HyperOS operating system, as well as the specifications of your TV. Modern Smart TVs support a wide range of codecs and protocols, making wired connection as efficient as possible.
In this article, we will take a closer look at all the nuances of connection settings, necessary cables and hidden features that will turn your TV into a powerful monitor for a smartphone, learn how to avoid delays and how to properly adjust the resolution for maximum picture clarity.
Equipment and cable preparation required
The first step is to choose the right cable, as not all of the cables are available. USB-The cables are the same. Video and data require a cable that supports the standard. USB 3.0 or higher, although basic file transfers may be sufficient USB 2.0.
If your smartphone is equipped with a USB Type-C connector and the TV has only a classic HDMI input, you will need a special adapter or USB-C to HDMI adapter. These adapters are often called “hubs” and they can cost more than a conventional cable, but they provide high-resolution digital video signal transmission.
- 🔌 Cable USB Type-C to Type-C or Micro-USB (depending on the phone model) at least 1.5 meters long.
- 📺 Transitioner USB-C to HDMI (Only for models with video output support through the port).
- 💾 USB-flash drive or external hard drive (if you plan to view files directly from the drive).
Check the integrity of the ports on both devices before starting the connection. Dust or oxidation of the contacts can cause unstable operation or complete absence of signal.
⚠️ Attention: Use of low-quality adapters can lead to overheating of the charging port of the smartphone or voltage surges, which is dangerous for the motherboard.
Direct video transmission via USB-C to HDMI
The best way to connect is to use DisplayPort Alt Mode technology. If your Xiaomi smartphone (usually the flagship Mi series, Xiaomi Numbered series) supports this feature, you can stream the image directly to the TV without delay, in which case the TV perceives the phone as an external signal source, like a computer or console.
To implement this method, connect an adapter USB-C to HDMI To your smartphone, and then connect it to a regular TV HDMI-After the connection, you need to switch the signal source on the TV to the appropriate port. HDMI 1 HDMI 2. The image must appear automatically.
In some cases, you need to activate the output mode manually. To do this, go to the settings of the smartphone along the Settings path → Connections and Sharing → Connection to TV. Here you can select the output resolution and refresh rate of frames.
Which Xiaomi models support USB video output?
The advantage of this method is that it does not have to be loaded on the processor when encoding video, since the signal is transmitted digitally, which is especially important for viewing 4K HDR content, where every detail of color reproduction is important.
Use of the USB-file-storage
If direct video output is not supported, the most reliable option is to use the video. USB-You copy movies onto a drive, plug them into a TV, and play them through a built-in media player, and this method doesn't require the Internet, and it works even on old Smarts. TV.
Format the flash drive to a FAT32 or NTFS file system to begin with. FAT32 has a file size limit (no more than 4GB), so for high-quality movies, it's best to choose NTFS if your TV supports this file system.
| File system | Max. File size. | Compatibility with TV | Recommendation |
|---|---|---|---|
| FAT32 | 4GB | 100% (All TVs) | For photos and short videos |
| NTFS | No restrictions. | 90% (Smart TV) | For Full HD and 4K movies |
| exFAT | No restrictions. | 70% (New TV) | For storage >64 GB |
| EXT4 | No restrictions. | 10% (Android TV) | Only for advanced users |
After copying files to the flash drive, remove it from the computer safely (safe extraction) and paste it into the computer. USB-Use the remote, open the Media or Files app and select the film you want.
☑️ Preview check
Configure debugging over USB for advanced features
For users who want to control the TV or transfer data to a deeper level, it may be necessary to enable debugging over USB.This hidden developer menu allows the computer or other devices to have full access to the Android system.
To activate this mode, go to Settings → About Phone and quickly press 7 times on the MIUI Version or OS Version. After the message “You became a developer” appears, return to the main settings menu, select Additional → For developers and activate the Debugging switch over USB.
When you connect to a new device (for example, to a set-top box on Android), a request for debugging permission will appear on the smartphone screen. You must tick the "Always Allow from this computer" box and confirm the action.
⚠️ Warning: Do not turn on debugging by USB Connecting to public charging stations or unfamiliar computers, as this could create a vulnerability to your personal data.
The feature also allows you to use apps to control your TV from your smartphone, emulating remote or keyboard commands, but this step is not usually required to simply watch movies through a cable.
Problems with codecs and video formats
A common problem when playing movies with USB is the lack of support for certain codecs built-in TV player. Even if the file is copied correctly, the TV can write "Format not supported" or play video without sound.
The most common codecs are H.264 (AVC) and H.265 (HEVC), which older TVs may not “understand” H.265, which is used for 4K video, in which case the solution would be to install a third-party player if the TV operating system (such as Android TV) allows it.
- 🎬 VLC Android is a universal player that supports almost all audio and video formats.
- 🎬 MX Player – a powerful playback engine with support for hardware acceleration.
- 🎬 Nova Video Player is great for creating a beautiful library of poster movies.
If you can't install apps on your TV, the only way out is to convert the video file on your computer to a more compatible format before you write it to a flash drive. Use programs like HandBrake to transcode.
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If the video twitches or slows when playing from USB, try lowering the bitrate of the file or using a flash drive with a higher read speed (USB 3.0).
Alternatives: Wireless broadcast and Mi Drop
Although the topic of the article is devoted USB-And when you're connected, you can't help but mention wireless alternatives that are often more convenient. Miracast technology (called "Translation" in Xiaomi) allows you to duplicate your smartphone screen on your TV wirelessly, if both devices are on the same Wi-Fi network.
To activate, open the notification curtain and select Translation. The phone will find available devices. If the TV does not have built-in Wi-Fi Direct, you can use the Chromecast or Android TV Box.
Another option is to transfer files via Mi Drop (now part of Xiaomi Share) or via the FTP. You can start it. FTP-server through the file manager MIUI, introduce IP-address to the address bar of the conductor on Smart TV (if it supports) and access your phone files directly.
⚠️ Attention: High-resolution wireless video transmission (4K) It can cause delays (lag) and compression artifacts, so for movie nights, cable remains the preferred option.
The choice between cable and wireless depends on your priorities: stability and quality (USB) or convenience and no wires (Wi-Fi).
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The wired connection via USB-C to HDMI ensures no delays and maximum picture quality, which is critical for gaming and viewing 4K HDR content.