Modern Xiaomi smartphones have powerful screens, but sometimes you want to immerse yourself in watching your favorite movie on a big TV screen. Standard wireless technologies such as Miracast or Chromecast often require stable Wi-Fi, which can fail at the most inopportune moment. It is in such situations that the time-tested wired method of connecting through the USB-Interface that ensures stable data transfer without delay.
However, simply connecting devices with a cable is not enough: the Android operating system by default blocks access to the file system for the sake of user safety. Owners of Xiaomi, Redmi and POCO smartphones need to know the subtleties of setting up the USB Debugging interface or USB modes so that the TV can recognize the phone as an external drive. In this article, we will analyze all the nuances of wired connection that are often missed in standard guides.
⚠️ Attention: Using cheap "charging-only" cables without data lines will make the connection useless.Make sure your cord supports the standard USB 2.0 or higher for file transfer.
Technical limitations and opportunities USB-connection
Before we start setting up, it's important to be clear about what we're connecting. HDMI-cable that transmits a finished video signal, USB-The phone-TV interface is most often in storage mode, which means you're not broadcasting a desktop image in real time, but you're giving the TV access to files.
TVs with Smart function TV Or media players can read the file system of the connected device, if your TV doesn't have smart features but it's equipped with a file system. USB-In the port, it may not see the phone, as it requires a special driver or mode. MTP, The old models don't support.
There's also technology. MHL (Mobile High-Definition Link, which allows video transmission via USB-connector, but it's rare and requires full hardware compatibility of both devices. In 95% of cases with Xiaomi, we'll set up a flash drive emulation mode to play video files with the TV's built-in player.
Equipment and cable preparation required
To succeed, you will need not only the smartphone and the TV, but also the right cable. The standard cable that comes with the phone is often only designed to charge and sync with the computer, but does not always work correctly with other brands of TVs.
Note the connectors: If you have a new Xiaomi with a Type-C port and the TV has only a classic USB-A, you will need a corresponding adapter or Type-C to USB-A cable. The quality of the cable’s insulation and shielding directly affects the ability to transfer large amounts of data without read errors.
- 🔌 Cable USB Type-C to USB-A (Preferably original or certified).
- 📺 TV with support for reading media files through USB (formats MKV, MP4, AVI).
- 📱 Xiaomi smartphone with unlocked bootloader (for some methods) or standard rights.
- 🎬 Video files stored in the phone memory or on SD-map.
It is recommended to check the cable on another device, such as a computer, before connecting, to make sure that it works. If the computer sees the phone and allows you to copy files, then the cable is good and has the necessary data lines.
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Use cables no longer than 1.5 meters long. Long cables can cause a voltage drop, which makes the TV unable to "unwind" the drive.
Setting up USB mode on Xiaomi smartphone
The most critical step is to set up the smartphone correctly, and by default, when you connect to an external device, Xiaomi goes into Charge Only mode. To get the TV to see the files, you need to manually switch this setting.
Connect the cable to your phone and TV. You'll see a USB connection notification on your smartphone screen. Click on it and select File Transfer (MTP) or Photo Transfer (PTP) mode. If the notification doesn't appear, go to the settings.
Settings → About Phone → Press 7 times on "Version MIUI" → Settings → Advanced Settings → For Developers → Configuration USB by defaultIn the Developer Menu, find the USB configuration and set the MTP value. This will make the phone always offer file transfer mode when connected. It’s also worth checking if USB debugging is enabled, although this is rarely required for simple video viewing, but can help with diagnosis.
⚠️ Warning: When you turn on Developer Mode, be careful with other settings. Do not change settings that you do not know the value of so as not to disrupt the system.
☑️ Checking settings USB
Instructions for image output and reproduction
Once the phone is set up, move to the TV, and the process may vary slightly depending on your TV's operating system (Android TV, WebOS, Tizen or proprietary shell).
Turn on the TV and use the remote control to go to the source menu (Source or Input), find the USB port where you connected the phone, the TV should identify the new device and suggest to start the media player.
If you don't automatically start, open the Media Player, Gallery, or Files app on your TV. Your smartphone should appear on the list of available drives. Find the folder where the video is stored (usually DCIM, Download, or Movies) and run the file.
| Parameter | MTP mode | PTP mode | Charging mode |
|---|---|---|---|
| Access to files | Complete. | Only a photo. | No. |
| Compatibility with TV | Tall. | Medium | Low. |
| Transmission speed | Tall. | Medium | Absent. |
| Charging the phone | There is. | There is. | There is. |
The control of playback (pause, rewind) is carried out by the TV remote, the smartphone in this case acts as passive storage, and the phone screen can be turned off to save energy.
What if the TV says “File is not supported”?
Solution: Phone not visible or video slows
The most common problem is that the TV just doesn't respond to the connection, in which case, first check the file system format. Android defaults to a file system that older TVs may not read, and password protection of the lock screen may also interfere.
If the video is played but constantly buffered or twitched, the problem may be the bitrate of the video file or the read speed. USB 2.0 has bandwidth limitations, especially when reading from internal memory, which can be occupied by system processes.
- 🔒 Unlock your phone screen before connecting if required by the security system.
- 🔄 Restart both devices if the connection is not installed the first time.
- 📂 Check if the video folder is too deep (some TVs don't read paths longer than 5 levels).
- ⚡ Turn off background downloads on your phone to free up the channel USB.
Sometimes cleaning up the Media Service app cache on your TV helps, go to your TV settings, find the apps, and select the data cleanup for the built-in player, which will reset the list of indexed files and can help you rediscover the phone.
Alternative Wired Methods for Xiaomi
If the classic drive mode doesn’t suit you with quality or functionality, consider using USB-C to HDMI adapters. It’s a completely different approach: the phone transmits a digital video signal, and the TV becomes just a monitor.
To implement this method, your Xiaomi smartphone must support USB-C (DisplayPort Alt Mode) video output technology. Flagship models often have this feature, whereas budget Redmis may not have this hardware capability.
You will need to purchase an active USB-C → HDMI adapter. Once connected, the phone will automatically detect an external display, you can duplicate the screen or expand it by streaming any content, including games and a browser, in high resolution.
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Regime. USB-storage (MTP) — The most versatile way to run on 90% of TVs without buying expensive adapters, but it doesn’t allow you to broadcast the screen in real time.