Using a large screen to view media from a smartphone is not just convenient, but also necessary for a comfortable pastime. Xiaomi device owners often look for ways to sync with the TV to display photos, videos or documents on a high-diagonal display. Wired connection through USB-Interface remains one of the most reliable methods of data transmission, especially when wireless protocols are unstable or require complex network configuration.
However, unlike transferring files to a computer, connecting the phone directly to the TV via a computer. USB-The default mode is often perceived by the TV as a charger rather than a drive. To successfully complete a task, the user needs to understand the difference between port modes and know what settings are. MIUI You need to activate to display the content correctly.
In this guide, we will take a closer look at all the nuances of wired connectivity, including the specifications for cables, setting up debugging modes, and possible alternatives if the standard method didn’t work. You will learn how to turn your smartphone into a full-fledged media center controlled from the TV remote, and what hidden features of the system can help in this process.
Technical requirements and equipment preparation
The first step is to check the physical compatibility of devices. Not all cables are equally suitable for video or high-volume data. The standard charging cable that comes with budget models often only supports power transfer and low-speed data exchange, which is not enough for streaming video or fast file transfer.
It is important to make sure your TV is equipped. USB-Some older TV models can only give out 0.5 Amps, which will lead to a quick discharge of the Xiaomi smartphone during use or the inability to determine the device at all.
- 🔌 Use the standard cable USB 3.0 or higher with a bandwidth of at least 480 Mbps for stable data transfer.
- ⚡ Check the specification. USB-TV port: port labeled with TV port "HDD" or "5V 1A/2A".
- 📱 Make sure that the Xiaomi smartphone has a connector installed USB Type-C, which supports the protocol OTG (On-The-Go).
⚠️ Note: Using cheap cables without shielding can lead to interference in signal transmission and even damage to the smartphone power controller.
Setting up USB mode on Xiaomi smartphone
After the devices are physically connected, a USB mode notification should appear on the smartphone screen. By default, Android selects Charge Only mode, making the device invisible to the TV. You need to manually change this setting.
Lower the notification curtain and find the message "Charge via USB" or "USB settings." Click on it to open the mode selection menu. To transfer files and access the media library, select the option "File Transfer" (MTP) or "Photo Transfer" (PTP). MTP mode is the most versatile for modern Smart TVs.
If the TV doesn’t respond to MTP mode selection, try switching to PTP. This protocol emulates digital camera connectivity and is often better recognized by TV multimedia systems, especially if the TV’s built-in file manager doesn’t see the smartphone in storage mode.
☑️ Checking settings USB
In some cases, you need to activate USB debugging to ensure that the TV correctly identifies the device, although this is rarely required and depends on the specific TV model. To do this, go to Settings → About Phone and quickly click on the MIUI version seven times until the message “You became a developer” appears.
Then on the menu Additional. → For developers, find the item "Debugging by USB" This will allow the system to interact more deeply with external devices, but remember to turn off this feature after use for security reasons.
Use of the function USB-modem and ethernet
There is a lesser known but highly useful use case. USB-Connectivity -- giving the TV the Internet through your smartphone. TV Does not have a built-in Wi-Fi module or wireless connection is unstable, you can use Xiaomi as an external network card.
To implement this method, connect your smartphone to your TV with a cable and go to your phone's settings. Find the Access Point and modem section and activate the switch "USB-The TV must recognize the new wired network connection automatically.
- 🌐 This method allows you to stream online video in high quality without buffering, characteristic of weak Wi-Fi.
- 📶 Connection speeds will be limited by mobile internet or Wi-Fi speeds to which the smartphone is connected.
- 🔋 Regime. USB-The modem consumes a significant amount of power, so keep the phone connected to the charger or make sure the TV gives off sufficient current.
The advantage of this approach is the stability of ping, which is critical for online gaming on TV or watching streaming video in the video. 4K. Wired connection through USB-The modem eliminates radio interference, which is often found in apartment buildings.
Why can't the TV see? USB-modem?
Specifics of working with file systems and formats
When connecting a smartphone as an external drive, the file system becomes a key factor.TVs, especially models released a few years ago, may not support modern file systems like exFAT or NTFS, which are often used in Android by default for internal partitions.
If the TV is making a beep when you connect, but there's no new device in the Input menu, it's probably the format that's the problem, and in that case, the TV is physically seeing the connection, but it can't programmatically read the directory structure.
| File system | Support TV | Max. File size. | Recommendation |
|---|---|---|---|
| FAT32 | Nearly 100%. | 4GB | Perfect for compatibility |
| NTFS | Partial | No restrictions. | Only for the new Smart TVs |
| exFAT | New models | No restrictions. | For 4K video files |
| EXT4 | No (Linux) | No restrictions. | Not used for TV. |
For maximum compatibility, it is recommended to store media files intended for viewing on TV in sections with the FAT32 file system. However, remember the 4GB limit on the size of a single file. If you need to play a movie in a high bitrate that weighs more, you will have to find compromises or use a network connection.
⚠️ Warning: Attempting a TV to write data to a partition of a smartphone formatted in an incompatible system may result in a formatting request.Be careful not to lose data on the phone!
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If you often connect your phone to different devices, create a separate folder "TV_Share" At the root of internal memory and store files for the TV there – this will speed up navigation on the TV menu.
Alternative methods of wired image translation
Direct connection to USB If your goal is to duplicate the screen of your smartphone (Screen Mirroring) or display an image of games and interfaces, the standard one is: USB-The cable without the extra adapters can't do that. USB It is not designed to transmit video stream in real time without special drivers.
To fully display the image through the wire, you need to use adapters such as USB-C to HDMI. In this case, the USB port is used to transmit a video signal. Xiaomi smartphones with flagship-level processors often support DisplayPort Alt Mode technology, which allows you to display the picture through the charging port.
The connection process is as follows:
- Connect the USB-C to HDMI adapter to your smartphone.
- Connect the adapter to the TV via an HDMI cable.
- Switch the signal source on the TV to the appropriate HDMI port.
- The image from the Xiaomi screen should be automatically duplicated on TV.
It is important to note that Xiaomi’s budget models may not support video output via USB-C. In this case, the system will simply ignore the connection or use the port only for charging. Check the specification of your model on the manufacturer’s website, looking for support for “Video Out” or “DisplayPort over USB-C”.
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A standard USB cable does not transmit a video signal to duplicate the screen. to output the image (Mirror) requires a special adapter USB-C to HDMI and support for this function from the smartphone.
Solving common problems and errors
Even if all the instructions are followed, there can be technical difficulties, and one of the common problems is that the power is not enough, and if the smartphone starts to run out quickly or reconnect cyclically, the TV does not have enough power to keep the device running.
In such a situation, it is recommended to use USB-This device will allow you to supply enough current to the smartphone, while maintaining the data channel with the TV, and the problem may lie in the pollution of the port. USB on the phone itself, where the dust and pile stuffed.
- 🧹 Clean the port carefully. USB-C on a smartphone with a wooden toothpick or compressed air.
- 🔄 Try another one. USB-port on the television, preferably one marked as "HDD" or has a maximum current.
- 📲 Restart both devices: Sometimes a software glitch in Android drivers or TV firmware blocks recognition.
If the TV sees folders but doesn't play video files, the problem may be the codec. TVs' built-in players often don't support modern audio or video compression formats, such as HEVC (H.265) or Dolby Atmos. In this case, it's better to use a built-in smartphone player and output an image via an HDMI adapter or use Chromecast wireless protocols.
Remember that MIUI software has an aggressive power saving system. Make sure that the battery settings for the USB or Media Storage system process do not set a background activity limit that can interrupt the connection when the phone screen is off.